* m4/druntime/os.m4 (DRUNTIME_OS_LINK_SPEC): New macro.
	* configure.ac: Call it.
	* configure: Regenerate.
	* Makefile.in, libdruntime/Makefile.in, src/Makefile.in,
	testsuite/Makefile.in: Regenerate.
	* src/libgphobos.spec.in (*link): Append OS_LINK_SPEC.

From-SVN: r270346