Conditionally disable tests of non-standard extensions

Conditionally disable tests of non-standard extensions

These tests include uses of the extension to allow allocators with the
wrong value_type in containers. Skip those parts of the tests when
__STRICT_ANIS__ is defined.

	* testsuite/23_containers/forward_list/requirements/
	explicit_instantiation/5.cc [__STRICT_ANSI__]: Don't test non-standard
	extension.
	* testsuite/23_containers/list/requirements/explicit_instantiation/
	5.cc [__STRICT_ANSI__]: Likewise.
	* testsuite/23_containers/map/requirements/explicit_instantiation/5.cc
	[__STRICT_ANSI__]: Likewise.
	* testsuite/23_containers/multimap/requirements/explicit_instantiation/
	5.cc [__STRICT_ANSI__]: Likewise.
	* testsuite/23_containers/multiset/requirements/explicit_instantiation/
	5.cc [__STRICT_ANSI__]: Likewise.
	* testsuite/23_containers/set/requirements/explicit_instantiation/5.cc
	[__STRICT_ANSI__]: Likewise.
	* testsuite/23_containers/unordered_map/requirements/debug_container.cc
	[__STRICT_ANSI__]: Likewise.
	* testsuite/23_containers/unordered_map/requirements/
	explicit_instantiation/5.cc [__STRICT_ANSI__]: Likewise.
	* testsuite/23_containers/unordered_multimap/requirements/
	explicit_instantiation/5.cc [__STRICT_ANSI__]: Likewise.
	* testsuite/23_containers/unordered_multiset/requirements/
	explicit_instantiation/5.cc [__STRICT_ANSI__]: Likewise.
	* testsuite/23_containers/unordered_set/requirements/
	explicit_instantiation/5.cc [__STRICT_ANSI__]: Likewise.

From-SVN: r265332