configure.ac: Add TARGET for x86_64-*-darwin*.

2006-12-14  Andreas Tobler  <a.tobler@schweiz.org>

	* configure.ac: Add TARGET for x86_64-*-darwin*.
	* Makefile.am (nodist_libffi_la_SOURCES): Add rules for 64-bit sources
	for X86_DARWIN.
	* src/x86/ffitarget.h: Set trampoline size for x86_64-*-darwin*.
	* src/x86/darwin64.S: New file for x86_64-*-darwin* support.
	* configure: Regenerate.
	* Makefile.in: Regenerate.
	* include/Makefile.in: Regenerate.
	* testsuite/Makefile.in: Regenerate.
	* testsuite/libffi.special/unwindtest_ffi_call.cc: New test case for
	ffi_call only.

From-SVN: r119856