Run most tests in both C++98 and C++11 modes.

	Run most tests in both C++98 and C++11 modes.
gcc/testsuite/
	* lib/target-supports.exp (check_effective_target_c++11): New.
	(check_effective_target_c++98): New.
	* lib/g++-dg.exp (g++-dg-runtest): New.
	* [various.exp]: Use g++-dg-runtest.
	* [various.C]: Fix for C++11 mode.
gcc/cp/
	* Make-lang.in (check_g++_parallelize): Add dg-torture.exp.
	(check-c++0x): Obsolete.
/
	* Makefile.def (language=c++): Remove check-c++0x.
	* Makefile.in (check-gcc-c++): Regenerate.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@181222 138bc75d-0d04-0410-961f-82ee72b054a4