* Makefile.common: Add rule to build assembler code.
	(.SUFFIXES): Add .S.
	* Makefile.in (VPATH): Drop CONFIG_DIR.
	(EXTRA_DLL_OFILES): Remove.
	(DLL_OFILES): Remove EXTRA_DLL_OFILES.
	(ASFLAGS): Define as -D_WIN64 on x86_64.
	(GMON_OFILES): Add mcountFunc.o.
	($(srcdir)/$(TLSOFFSETS_H)): Use target_cpu rather than CONFIG_DIR.
	* configure.ac (CONFIG_DIR): Remove definition.
	* configure: Regenerate.
	* gcrt0.c: Use latest version from Mingw-w64 project.
	* gmon.c: Ditto.
	* gmon.h: Ditto.
	* mcount.c: Ditto.
	* mcountFunc.S: Ditto, new file.
	* profil.c: Ditto.
	* profil.h: Ditto.
	* config: Remove entire directory.