ALAC encoder produces invalid bitstream on Apple Silicon(in native mode)

While running on M1 in Native mode, the ALAC encoder produces invalid bitstream.
Root cause:
Swap32BtoN implementation is wrong.

Could you merge this fix into master:

```
#elif defined (__arm__) || defined(__aarch64__)
#define TARGET_RT_LITTLE_ENDIAN 1
#endif

```
https://github.com/philippe44/alac/blob/master/EndianPortable.c
