2012-05-16  Sriraman Tallam  <tmsriram@google.com>

	Port from google/gcc-4_6 
	r177289, r177308, r179104, r179289, r179303, r179404, r182447

	* config.h.in: Generate.
	* configure: Generate.
	* Makefile.in: New file.
	* configure.ac: New file.
	* callgraph.h: New file.
	* callgraph.c: New file.
	* function_reordering_plugin.c: New file.
	* Makefile.am: Generate.
	* aclocal.m4: Generate.