x86-64: Update AVX512FP16 ABI tests for x32

x86-64: Update AVX512FP16 ABI tests for x32

On x32, long is the same as int and pointer is 32 bits.  Update AVX512FP16
ABI tests:

1. Replace long with long long for 64-bit integers.
2. Update type and alignment for long and pointer.
3. Skip tests for long on x32.

	* gcc.target/x86_64/abi/avx512fp16/args.h: Replace long with
	long long.
	(XMM_T): Rename _long to _longlong and _ulong to _ulonglong.
	(X87_T): Rename _ulong to _ulonglong.
	* gcc.target/x86_64/abi/avx512fp16/defines.h (TYPE_SIZE_LONG):
	Define to 4 if __ILP32__ is defined.
	(TYPE_SIZE_POINTER): Likewise.
	(TYPE_ALIGN_LONG): Likewise.
	(TYPE_ALIGN_POINTER): Likewise.
	* gcc.target/x86_64/abi/avx512fp16/test_3_element_struct_and_unions.c
	(main): Skip test for long if __ILP32__ is defined.
	* gcc.target/x86_64/abi/avx512fp16/test_m64m128_returning.c
	(do_test): Replace _long with _longlong.
	* gcc.target/x86_64/abi/avx512fp16/test_struct_returning.c:
	(check_300): Replace _ulong with _ulonglong.
	* gcc.target/x86_64/abi/avx512fp16/m256h/args.h: Replace long
	with long long.
	(YMM_T): Rename _long to _longlong and _ulong to _ulonglong.
	(X87_T): Rename _ulong to _ulonglong.
	* gcc.target/x86_64/abi/avx512fp16/m512h/args.h: Replace long
	with long long.
	(ZMM_T): Rename _long to _longlong and _ulong to _ulonglong.
	(X87_T): Rename _ulong to _ulonglong.