libetpan: config script should not contain -arch flags

[ryandesign@…]

When I build libetpan universal, the universal arch flags are embedded into the config script:

$ grep -- -arch /opt/local/bin/libetpan-config
      echo $libdir -letpan -L/opt/local/lib -arch x86_64 -arch i386 -L/opt/local/lib -L/opt/local/lib -L/opt/local/lib -lcurl -L/opt/local/lib -L/opt/local/lib -L/opt/local/lib -lidn -lssl -lcrypto -lssl -lcrypto -lz -lz -lexpat -lssl -lcrypto      -lsasl2 

This should not be; it prevents me from building a dependent of libetpan non-universal.

[ryandesign@…]

proposed patch

[ryandesign@…]

Committed in r66602 (maintainer timeout).