libstdc++: Replace TR1 components with C++11 ones in test utils

libstdc++: Replace TR1 components with C++11 ones in test utils

Signed-off-by: Jonathan Wakely <jwakely@redhat.com>
libstdc++-v3/ChangeLog:

	* testsuite/util/testsuite_common_types.h: Replace uses of
	tr1::unordered_map and tr1::unordered_set with their C++11
	equivalents.
	* testsuite/29_atomics/atomic/cons/assign_neg.cc: Adjust
	dg-error line number.
	* testsuite/29_atomics/atomic/cons/copy_neg.cc: Likewise.
	* testsuite/29_atomics/atomic_integral/cons/assign_neg.cc:
	Likewise.
	* testsuite/29_atomics/atomic_integral/cons/copy_neg.cc:
	Likewise.
	* testsuite/29_atomics/atomic_integral/operators/bitwise_neg.cc:
	Likewise.
	* testsuite/29_atomics/atomic_integral/operators/decrement_neg.cc:
	Likewise.
	* testsuite/29_atomics/atomic_integral/operators/increment_neg.cc:
	Likewise.