Override all per-target *_LINK variables correctly.

boehm-gc/:
	* Makefile.am (libgcjgc_la_LINK, gctest_LINK): New.
	(gctest_LDADD): Depend on libgcjgc.la instead of ./libgcjgc.la,
	so that library dependency resolution works with portable make.
	* Makefile.in: Regenerate.

libgfortran/:
	* Makefile.am (libgfortranbegin_la_LINK): New.
	* Makefile.in: Regenerate.

libgomp/:
	* Makefile.am (libgomp_la_LINK): New.
	* Makefile.in: Regenerate.

libjava/:
	* Makefile.am (libgij_la_LINK, libjvm_la_LINK): New.
	* Makefile.in: Regenerate.

libstdc++-v3/:
	* src/Makefile.am (libstdc___la_LINK): New.
	* src/Makefile.in: Regenerate.

From-SVN: r151627