i386: Modify testcases failed under -DDEBUG

gcc/testsuite/ChangeLog:

	* gcc.target/i386/adx-check.h: Include stdio.h when DEBUG
	is defined.
	* gcc.target/i386/avx512fp16-vscalefph-1b.c: Do not define
	DEBUG.
	* gcc.target/i386/avx512fp16vl-vaddph-1b.c: Ditto.
	* gcc.target/i386/avx512fp16vl-vcmpph-1b.c: Ditto.
	* gcc.target/i386/avx512fp16vl-vdivph-1b.c: Ditto.
	* gcc.target/i386/avx512fp16vl-vfpclassph-1b.c: Ditto.
	* gcc.target/i386/avx512fp16vl-vgetexpph-1b.c: Ditto.
	* gcc.target/i386/avx512fp16vl-vgetmantph-1b.c: Ditto.
	* gcc.target/i386/avx512fp16vl-vmaxph-1b.c: Ditto.
	* gcc.target/i386/avx512fp16vl-vminph-1b.c: Ditto.
	* gcc.target/i386/avx512fp16vl-vmulph-1b.c: Ditto.
	* gcc.target/i386/avx512fp16vl-vrcpph-1b.c: Ditto.
	* gcc.target/i386/avx512fp16vl-vreduceph-1b.c: Ditto.
	* gcc.target/i386/avx512fp16vl-vrndscaleph-1b.c: Ditto.
	* gcc.target/i386/avx512fp16vl-vrsqrtph-1b.c: Ditto.
	* gcc.target/i386/avx512fp16vl-vscalefph-1b.c: Ditto.
	* gcc.target/i386/avx512fp16vl-vsqrtph-1b.c: Ditto.
	* gcc.target/i386/avx512fp16vl-vsubph-1b.c: Ditto.
	* gcc.target/i386/readeflags-1.c: Include stdio.h when DEBUG
	is defined.
	* gcc.target/i386/rtm-check.h: Ditto.
	* gcc.target/i386/sha-check.h: Ditto.
	* gcc.target/i386/writeeflags-1.c: Ditto.