PR sanitizer/80953
	Merge from LLVM revision 355978
	* sanitizer_common/sanitizer_allocator_primary32.h
	(class SizeClassAllocator32): Assert that kSpaceSize is power of 2 if
	SANITIZER_SIGN_EXTENDED_ADDRESSES is set.
	(PointerIsMine): Deal with SANITIZER_SIGN_EXTENDED_ADDRESSES.
	(ComputeRegionId): Likewise.
	* sanitizer_common/sanitizer_linux.cc (GetMaxVirtualAddress): Return
	appropriate value for SPARC 64-bit.
	* sanitizer_common/sanitizer_platform.h (SANITIZER_MMAP_RANGE_SIZE):
	Define for SPARC.
	(SANITIZER_SIGN_EXTENDED_ADDRESSES): Define to 1 for SPARC 64-bit.

From-SVN: r269639