The mtree should include ${prefix}/lib/pkgconfig

[ryandesign (Ryan Carsten Schmidt)]

There are a few ports which install pkgconfig files manually, and they need to first create the pkgconfig directory like this:

pre-destroot {
    xinstall -d ${destroot}${prefix}/lib/pkgconfig
}

To make this unnecessary, I think it makes sense for this directory to be a part of the standard mtree, and thus for MacPorts to create it automatically before the destroot phase runs.

[jmroot (Joshua Root)]

r54708