Adjust testcases for C++17 compatibility

Adjust testcases for C++17 compatibility

	* testsuite/26_numerics/headers/cmath/types_std_c++0x_neg.cc: Disable
	test for C++17.
	* testsuite/experimental/chrono/value.cc: Avoid ambiguities in C++17.
	* testsuite/experimental/ratio/value.cc: Likewise.
	* testsuite/ext/pb_ds/regression/hash_map_rand.cc: Disable test for
	C++17.
	* testsuite/ext/pb_ds/regression/hash_set_rand.cc: Likewise.
	* testsuite/ext/pb_ds/regression/list_update_map_rand.cc: Likewise.
	* testsuite/ext/pb_ds/regression/list_update_set_rand.cc: Likewise.
	* testsuite/ext/pb_ds/regression/priority_queue_rand.cc: Likewise.
	* testsuite/ext/pb_ds/regression/tree_map_rand.cc: Likewise.
	* testsuite/ext/pb_ds/regression/tree_set_rand.cc: Likewise.
	* testsuite/ext/pb_ds/regression/trie_map_rand.cc: Likewise.
	* testsuite/ext/pb_ds/regression/trie_set_rand.cc: Likewise.
	* testsuite/tr1/5_numerical_facilities/special_functions/
	10_cyl_bessel_k/airy.cc: Adjust namespace of __detail::__airy for
	C++17 compatibility.

From-SVN: r239534