spu-c.c (__vector_keyword): New variable.

gcc/
	* config/spu/spu-c.c (__vector_keyword): New variable.
	(vector_keyword): Likewise.
	(spu_categorize_keyword): New function.
	(spu_macro_to_expand): Likewise.
	(spu_cpu_cpp_builtins): Enable context-sensitive macros if not
	compiling an ISO C dialect.

gcc/testsuite/
	* gcc.target/spu/vector.c: New test.
	* gcc.target/spu/vector-ansi.c: Likewise.

From-SVN: r138106