python3x: reinplace warnings

[ctreleaven (Craig Treleaven)]

Happened to notice these while doing a rather large build from source:

--->  Fetching distfiles for python34
--->  Attempting to fetch Python-3.4.6.tar.xz from http://ykf.ca.distfiles.macports.org/MacPorts/mpdistfiles/python34
--->  Attempting to fetch Python-3.4.6.tar.xz from https://distfiles.macports.org/python34
--->  Attempting to fetch Python-3.4.6.tar.xz from http://www.python.org/ftp/python/3.4.6/
--->  Verifying checksums for python34                                               
--->  Extracting python34
--->  Applying patches to python34
Warning: reinplace s|xargs -0 rm -r|/usr/bin/xargs -0 /bin/rm -r|g didn't change anything in /opt/dvr/var/macports/build/_Users_macmyth_macports-ports_lang_python34/python34/work/Python-3.4.6/Mac/PythonLauncher/Makefile.in
--->  Configuring python34
--->  Building python34
--->  Staging python34 into destroot
Warning: reinplace s|${prefix}|/opt/dvr|g didn't change anything in /opt/dvr/var/macports/build/_Users_macmyth_macports-ports_lang_python34/python34/work/destroot/opt/dvr/etc/select/python/python34
Warning: reinplace s|${applications_dir}|/Applications/MacPorts|g didn't change anything in /opt/dvr/var/macports/build/_Users_macmyth_macports-ports_lang_python34/python34/work/destroot/opt/dvr/etc/select/python/python34
Warning: reinplace s|${developer_dir}|/Applications/Xcode.app/Contents/Developer|g didn't change anything in /opt/dvr/var/macports/build/_Users_macmyth_macports-ports_lang_python34/python34/work/destroot/opt/dvr/etc/select/python/python34
Warning: reinplace s|${prefix}|/opt/dvr|g didn't change anything in /opt/dvr/var/macports/build/_Users_macmyth_macports-ports_lang_python34/python34/work/destroot/opt/dvr/etc/select/python3/python34
Warning: reinplace s|${frameworks_dir}|/opt/dvr/Library/Frameworks|g didn't change anything in /opt/dvr/var/macports/build/_Users_macmyth_macports-ports_lang_python34/python34/work/destroot/opt/dvr/etc/select/python3/python34
Warning: reinplace s|${applications_dir}|/Applications/MacPorts|g didn't change anything in /opt/dvr/var/macports/build/_Users_macmyth_macports-ports_lang_python34/python34/work/destroot/opt/dvr/etc/select/python3/python34
Warning: reinplace s|${developer_dir}|/Applications/Xcode.app/Contents/Developer|g didn't change anything in /opt/dvr/var/macports/build/_Users_macmyth_macports-ports_lang_python34/python34/work/destroot/opt/dvr/etc/select/python3/python34
--->  Installing python34 @3.4.6_0
--->  Activating python34 @3.4.6_0
--->  Cleaning python34

[ctreleaven (Craig Treleaven)]

Also python35:

--->  Fetching distfiles for python35
--->  Attempting to fetch Python-3.5.3.tar.xz from http://ykf.ca.distfiles.macports.org/MacPorts/mpdistfiles/python35
--->  Attempting to fetch Python-3.5.3.tar.xz from https://distfiles.macports.org/python35
--->  Attempting to fetch Python-3.5.3.tar.xz from http://www.python.org/ftp/python/3.5.3/
--->  Verifying checksums for python35                                               
--->  Extracting python35
--->  Applying patches to python35
Warning: reinplace s|@@PREFIX@@|/opt/dvr|g didn't change anything in /opt/dvr/var/macports/build/_Users_macmyth_macports-ports_lang_python35/python35/work/Python-3.5.3/Lib/ctypes/macholib/dyld.py
Warning: reinplace s|xargs -0 rm -r|/usr/bin/xargs -0 /bin/rm -r|g didn't change anything in /opt/dvr/var/macports/build/_Users_macmyth_macports-ports_lang_python35/python35/work/Python-3.5.3/Mac/PythonLauncher/Makefile.in
--->  Configuring python35
--->  Building python35
--->  Staging python35 into destroot
Warning: reinplace s|${prefix}|/opt/dvr|g didn't change anything in /opt/dvr/var/macports/build/_Users_macmyth_macports-ports_lang_python35/python35/work/destroot/opt/dvr/etc/select/python/python35
Warning: reinplace s|${applications_dir}|/Applications/MacPorts|g didn't change anything in /opt/dvr/var/macports/build/_Users_macmyth_macports-ports_lang_python35/python35/work/destroot/opt/dvr/etc/select/python/python35
Warning: reinplace s|${developer_dir}|/Applications/Xcode.app/Contents/Developer|g didn't change anything in /opt/dvr/var/macports/build/_Users_macmyth_macports-ports_lang_python35/python35/work/destroot/opt/dvr/etc/select/python/python35
Warning: reinplace s|${prefix}|/opt/dvr|g didn't change anything in /opt/dvr/var/macports/build/_Users_macmyth_macports-ports_lang_python35/python35/work/destroot/opt/dvr/etc/select/python3/python35
Warning: reinplace s|${frameworks_dir}|/opt/dvr/Library/Frameworks|g didn't change anything in /opt/dvr/var/macports/build/_Users_macmyth_macports-ports_lang_python35/python35/work/destroot/opt/dvr/etc/select/python3/python35
Warning: reinplace s|${applications_dir}|/Applications/MacPorts|g didn't change anything in /opt/dvr/var/macports/build/_Users_macmyth_macports-ports_lang_python35/python35/work/destroot/opt/dvr/etc/select/python3/python35
Warning: reinplace s|${developer_dir}|/Applications/Xcode.app/Contents/Developer|g didn't change anything in /opt/dvr/var/macports/build/_Users_macmyth_macports-ports_lang_python35/python35/work/destroot/opt/dvr/etc/select/python3/python35
--->  Installing python35 @3.5.3_0
--->  Activating python35 @3.5.3_0
--->  Cleaning python35

[jmroot (Joshua Root)]

Mostly a dupe of #53683. Other bits fixed in [7dbe7c1242d114b2f223f533dd876ccb68a1ca39/macports-ports], [a552e1a22cc67e83ad22287ccf9d68e06894065b/macports-ports], [448d7055960b90a14933fdd3459b3801c808b9fe/macports-ports].