config:
	* arm/arm.h (TARGET_CPU_CPP_BUILTINS): Define.
	(CPP_SPEC): Update.
	(CPP_APCS_PC_SPEC, CPP_APCS_PC_DEFAULT_SPEC,
	CPP_FLOAT_SPEC, CPP_FLOAT_DEFAULT_SPEC, CPP_ENDIAN_SPEC,
	CPP_ENDIAN_DEFAULT_SPEC, CPP_INTERWORK_DEFAULT_SPEC,
	CPP_INTERWORK_SPEC, CPP_PREDEFINES): Remove.
	(EXTRA_SPECS): Update.
	* arm/conix-elf.h, arm/linux-elf.h, arm/netbsd.h, arm/riscix.h,
	arm/riscix1-1.h, arm/rtems-elf.h, arm/semiaof.h, arm/unknown-elf.h,
	arm/unknown-elf-oabi.h, arm/vxarm.h: Remove CPP_PREDEFINES and
	define TARGET_OS_CPP_BUILTINS if necessary.

From-SVN: r53463