extend-1.c (TEST_CHAR): Use signed char.

extend-1.c (TEST_CHAR): Use signed char.

gcc/testsuite/
	* gcc.target/mips/extend-1.c (TEST_CHAR): Use signed char.
	(TEST_SHORT): Reformat in the same way.
	* gcc.target/mips/octeon-exts-6.c (TEST_CHAR): Use signed char.
	(TEST_SHORT): Reformat in the same way.
	* gcc.target/mips/octeon2-lx-1.c (TEST): Make sign explicit.
	* gcc.target/mips/pr37362.c: Skip for mips-sde-elf.
	* gcc.target/mips/mmcount-ra-address-1.c (bazl): Add NOMIPS16.
	* gcc.target/mips/mmcount-ra-address-2.c (bar): Likewise.
	* gcc.target/mips/mmcount-ra-address-3.c (bar): Likewise.

From-SVN: r183737