These two tests have started to fail with the old std::string ABI. The
scan-assembler-not checks fail because they match debug info, not code.
Adding -g0 to the test flags fixes them.
libstdc++-v3/ChangeLog:
	* testsuite/21_strings/basic_string/modifiers/assign/char/move_assign_optim.cc:
	Do not generate debug info.
	* testsuite/21_strings/basic_string/modifiers/assign/wchar_t/move_assign_optim.cc:
	Likewise.
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-O1" }
+// { dg-options "-O1 -g0" }
 // { dg-do compile { target c++11 } }
 // { dg-final { scan-assembler-not "__throw_length_error" } }
 // { dg-final { scan-assembler-not "__throw_bad_alloc" } }
 
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-O1" }
+// { dg-options "-O1 -g0" }
 // { dg-do compile { target c++11 } }
 // { dg-final { scan-assembler-not "__throw_length_error" } }
 // { dg-final { scan-assembler-not "__throw_bad_alloc" } }