Crc: Only test non_temporal_store_memcpy_avx on AVX targets

non_temporal_store_memcpy_avx uses gnu::target("avx") to use AVX intrinsics
inside its function body even if the compiler was not configured for AVX
support. This is OK because non_temporal_store_memcpy_avx is guarded by a cpuid
check before it is called.

However, non_temporal_memcpy_test.cc performs no such cpuid guard. In practice,
nobody will really notice this bug as CPUs have had AVX for a long time by now.

That said, this does come up if one has compiled absl for x86_64 and runs the
binary on a arm64 Mac. This is because the Rosetta 2 emulation environment does
not support AVX or newer instructions.

PiperOrigin-RevId: 717991751
Change-Id: Id41bd186ebfd1cf7124ab5211fbfb74a01d5b56c

Author: majnemer

absl/crc/internal/non_temporal_memcpy_test.cc

@@ -57,6 +57,7 @@ TEST_P(NonTemporalMemcpyTest, SSEEquality) {
   }
 }
 
+#ifdef __AVX__
 TEST_P(NonTemporalMemcpyTest, AVXEquality) {
   uint8_t* src = a_.data() + GetParam().src_offset;
   uint8_t* dst = b_.data() + GetParam().dst_offset;
@@ -67,6 +68,7 @@ TEST_P(NonTemporalMemcpyTest, AVXEquality) {
     EXPECT_EQ(src[i], dst[i]);
   }
 }
+#endif
 
 // 63B is smaller than one cacheline operation thus the non-temporal routine
 // will not be called.