Log Message:
Strongly buildlinkify and use LIBTOOL_OVERRIDE instead of LTCONFIG_OVERRIDE
so pkgsrc's libtool is invoked (this looks like an increasingly common
problem with up-to-date GNOME packages).  Also change references to
*-config into ${*_CONFIG} so that the wrappers are used instead of the
original scripts (why is this such a common problem?!).