When running make (or unsermake), exec the absolute path.  This is really for people using make-install-prefix, since my
sudo has recently lost the ability to find unsermake for some reason.  I suspect a recent change in the Gentoo ebuild so
this is a pre-emptive workaround to hopefully reduce the "OMG kdesvn-build can't install" bugs.

svn path=/trunk/KDE/kdesdk/scripts/kdesvn-build; revision=433473