* config/s390/linux.h: (LIBPATH_SPEC, LIBPATH_ARCH31_SPEC,
LIBPATH_ARCH64_SPEC): Define.
(EXTRA_SPECS): Add libpath, libpath_arch31, libpath_arch64.
(STARTFILE_SPEC, ENDFILE_SPEC): Define; use libpath.
(LINK_ARCH31_SPEC): Add libpath_arch31 to search path.
(LINK_ARCH64_SPEC): Add libpath_arch64 to search path.

From-SVN: r52627