Rename XFLAGS to XCFLAGS and XXFLAGS to XCXXFLAGS

This is less confusing names and actually more reflexting what they are intended
to.

Discussed with:	brooks


git-svn-id: svn+ssh://svn.freebsd.org/base/head@273755 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
only install .pc files when we are not installing 32bit compat libs...

This fixes the problem of installing the .pc files multiple times...


git-svn-id: svn+ssh://svn.freebsd.org/base/head@273756 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f