re PR libstdc++/12189 (abi_check fails to build)

	PR libstdc++/12189
	* acinclude.m4 (GLIBCXX_CONFIGURE_TESTSUITE): Don't build
	abi_check if cross compiling.
	* aclocal.m4: Regenerated.
	* configure: Regenerated.

Co-Authored-By: Andreas Jaeger <aj@suse.de>

From-SVN: r71291