configure.in: Handle multilibs, support --enable-version-specific-runtime-libs.

configure.in: Handle multilibs, support --enable-version-specific-runtime-libs.

	* configure.in: Handle multilibs, support
	--enable-version-specific-runtime-libs.
	* Makefile.am (lib_LTLIBRARIES): Rename to ...
        (toolexeclib_LTLIBRARIES): this for multilib support.
	* Makefile.in: Regenerated.
	* configure: Regenerated.
	* aclocal.m4: Regenerated.

	* testsuite/lib/libmudflap.exp (libmudflap-init): Handle
	multilibs, using multilib directory instead of hardcoded path.
	Set LD_RUN_PATH.

From-SVN: r82527