re PR testsuite/49741 (make -k check-c++0x not multilib aware)

re PR testsuite/49741 (make -k check-c++0x not multilib aware)

	PR testsuite/49741
gcc/
	* Makefile.in ($(lang_checks_parallelized)): Allow --extra_opts
	rather than --tool_opts.
gcc/cp/
	* Make-lang.in (check-c++0x): Use --extra_opts instead of--tool_opts.
gcc/testsuite/
	* lib/g++.exp (${tool}_option_help, ${tool}_option_proc): Restore.
	Use --extra_opts instead of --additional_options.

	* Makefile.in (check-c++): Move check-gcc-c++0x after
	check-target-libstdc++-v3.

From-SVN: r176332