[Bug] VTA FSIM MacOS incompatibility

[gussmith23]

@vcanumalla is attempting to build FSIM on MacOS and running into issues:

• FSIM source includes malloc.h, which isn't present (at least not by default) on MacOS. Removing the import doesn't break the code, so it doesn't seem necessary.
• the memalign function is not present on MacOS. @vcanumalla was experimenting with replacing it with posix_memalign.

Are there instructions for building on MacOS specifically?

[xhmelon]

Hi @vegaluisjose @vinx13 @masahi, please close this issue as it has been resolved.