Fix libsanitizer build on OS X 10.1[01], macOS 10.12 (PR sanitizer/78267)

Fix libsanitizer build on OS X 10.1[01], macOS 10.12 (PR sanitizer/78267)

	fixincludes:
	PR sanitizer/78267
	* inclhack.def (darwin_availabilityinternal, darwin_os_trace_1)
	(darwin_os_trace_2, darwin_os_trace_3): New fixes.
	(hpux_stdint_least_fast): Remove spurious _EOFix_.
	* fixincl.x: Regenerate.
	* tests/bases/AvailabilityInternal.h: New file.
	* tests/bases/os/trace.h: New file.

2016-11-20  Jack Howarth  <howarth.at.gcc@gmail.com>

	libsanitizer:
	PR sanitizer/78267
	* sanitizer_common/sanitizer_mac.cc: Include <os/trace.h> only if
	compiler supports blocks extension.

From-SVN: r242633