libstdc++-v3/ChangeLog:

	* include/bits/utility.h (__is_in_place_type_v): Define
	variable template to detect in_place_type_t specializations.
	(__is_in_place_type): Replace class template with alias
	template using __is_in_place_type_v.
	* include/std/any (any(T&&)): Check __is_in_place_type first and
	avoid instantiating is_copy_constructible unnecessarily.

Tested powerpc64le-linux. Committed to trunk.