CWG 2094 - volatile scalars are trivially copyable.

CWG 2094 - volatile scalars are trivially copyable.

	PR c++/85679
	* tree.c (trivially_copyable_p): Don't check CP_TYPE_VOLATILE_P for
	scalar types.

	* g++.dg/ext/is_trivially_constructible1.C: Change the expected result
	for volatile int.
	* g++.dg/ext/is_trivially_copyable.C: New test.

	* testsuite/20_util/is_trivially_copyable/value.cc: Change the expected
	result for volatile int.

From-SVN: r271435