install-dependencies has more error output than necessary

[ryandesign (Ryan Carsten Schmidt)]

There seems to be some superfluous error messaging appearing from install-dependencies:

​https://build.macports.org/builders/ports-12_arm64-builder/builds/38762/steps/install-dependencies/logs/stdio

Error: Cannot install pure for the arch 'arm64' because
Error: its dependency llvm-3.4 only supports the archs 'ppc ppc64 i386 x86_64'.
Error: Failed to locate 'lzma' in path: '/opt/local/bin:/opt/local/sbin:/opt/bblocal/libexec/libarchive:/bin:/sbin:/usr/bin:/usr/sbin' or at its MacPorts configuration time location, did you move it?
    while executing
"error "$eMessage or at its MacPorts configuration time location, did you move it?""
    invoked from within
"try -pass_signal {
            return [macports::binaryInPath $prog]
        } catch {{*} eCode eMessage} {
            error "$eMessage or at its Mac..."
    (procedure "macports::findBinary" line 5)
Error: mportdepends pure-glpk activate failed: 1
Processing dependencies for 'pure-glpk' failed, aborting.
./mpbb/mpbb: error: `install-dependencies' failed to run successfully

The messages about lzma being missing seem to be unnecessary, unrelated to what the real problem was.

[jmroot (Joshua Root)]

​https://build.macports.org/builders/ports-11_arm64-builder/builds/43307/steps/install-dependencies/logs/stdio

[6c35baef3b10d6b457750b652662ba9e93ccf078/mpbb]

[ryandesign (Ryan Carsten Schmidt)]

Super, thanks!