* config/abi/post: New.
	* config/abi/*-linux-gnu: Move to..
	* config/abi/post/*-linux-gnu: ... here.	
	* config/abi/pre: New.
	* config/linker-map.gnu: Move to ..
	* config/abi/pre/gnu.ver: ... here.	
	* config/linker-map.dummy: Move to..
	* config/abi/pre/none.ver: ... here.
	* src/Makefile.am: Use ENABLE_SYMVERS_GNU,
	ENABLE_SYMVERS_DARWIN, ENABLE_SYMVERS_GNU_NAMESPACE.
	Use libstdc++-symbols.ver instead of libstdc++-symbol.ver.
	* src/Makefile.in: Regnerate.
	* acinclude.m4 (GLIBCXX_CONFIGURE_TESTSUITE): Adjust paths for new
	placement of abi baseline files.
	(GLIBCXX_ENABLE_SYMVERS): Add ENABLE_SYMVERS, ENABLE_SYMVERS_GNU,
	ENABLE_SYMVERS_DARWIN.  SYMVER_MAP to SYMVER_FILE.
	* configure: Regnerate.
	* config.h.in: Regnerate.
	* src/compatibility.cc: Adjust macro usage.
	


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@108748 138bc75d-0d04-0410-961f-82ee72b054a4