Resolve "wav writing uses wrong endiannes on Arm Windows"

• Related issues: #1577 (closed)
• Requested reviewers: @tamarapu

Reason why this change is needed

Reading audio output files from IVAS_dec with python on Arm Windows results in an error:

ValueError: File format b'FFIR' not understood. Only 'RIFF', 'RIFX', and 'RF64' supported.

Description of the change

• Fix fallback to little-endian in lib_util/tinywaveout_c.h
• Add specific checks for compiler macros defined by Visual Studio on Arm

Affected operating points

• wav file writing on Arm Windows

Closes #1577 (closed)