gcc:
	* config/mips/iris6.h (TARGET_C99_FUNCTIONS): Define.

	gcc/testsuite:
	* gcc.dg/builtins-config.h: Remove __sgi handling.
	* lib/target-supports.exp (add_options_for_c99_runtime): Add
	-std=c99 for mips-sgi-irix6.5*.

From-SVN: r169976