Changed AlignedAllocate to default to posix_memalign

[mihe]

I'm in the process of implementing iOS support for Godot Jolt, and it turns out that aligned_alloc is only available on iOS >=13, as seen here. According to that header it also appears that aligned_alloc is not available on macOS versions prior to 10.15 (Catalina).

What is available however (also found in the link above) is posix_memalign.

I figured instead of adding even more platform ifdef's to AlignedAllocate I would just simplify things a bit and always default to posix_memalign on anything but Windows, as this seems to be available on Android as well. Although, I'm not sure how this change fares on that one blue platform.

I ran PerformanceTest on macOS and saw no difference compared to aligned_allocate.

Also note that posix_memalign technically returns an error code, but seeing as how none of the other allocation functions had any error-handling I opted to just ignore it.

[jrouwe]

Note that I just fixed the Shared library compiler errors as part of #739 (github must have bumped a compiler version).

[mihe]

Alright, I guess either of us can merge in master here once #739 has been merged, if you'd prefer to see a successful run first.

[jrouwe]

Thanks!