Lower ARM architecture requirement for CRC32 instructions.

The changes ensure compatibility with compilers targeting ARMv7.
32-bit processors of architecture 8 and higher, or 64-bit processors running in 32-bit mode can have the CRC32 instructions.
With this change we will query the processor instead of the compiler architecture.

simd.c

@@ -198,6 +198,12 @@ int have_arm_crc32(void)
 #elif defined(__APPLE__)
     return have_crc32_apple();
 #else
+
+// Not defined in ARMv7 compilers, even if the CPU has the capability
+#ifndef HWCAP2_CRC32
+#define HWCAP2_CRC32 (1 << 4)
+#endif
+
     return getauxval(AT_HWCAP2) & HWCAP2_CRC32;
 #endif
 }