PR c++/86068
	* c-cppbuiltin.c (c_cpp_builtins): Fix a typo, set
	__cpp_transactional_memory to 201500 instead of 210500.

	* include/bits/c++config: Check __cpp_transactional_memory >= 201500L
	rather than __cpp_transactional_memory >= 201505L.

From-SVN: r261242