Log Message:
LIBTOOL_OVERRIDE and SHLIBTOOL_OVERRIDE are now shell globs relative to
WRKSRC.  LIBTOOL_OVERRIDE defaults to "libtool */libtool and */*/libtool,"
meaning that, in most packages, there's no need to set it.

So: Nuke tons of LIBTOOL_OVERRIDE=${WRKSRC} and adjust a few
SHLIBTOOL_OVERRIDEs (remove ${WRKSRC} from them).