[Issue 24124] ImportC: building stb_image.h has errors in gcc

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=24124

--- Comment #2 from Steven Schveighoffer <schveiguy at gmail.com> ---
Yes, I can define STBI_NO_SIMD and it will not use the SIMD calls. But this
might not be a general solution for projects which don't have that
configuration option.

Note that I believe LDC has fixed this:
https://github.com/ldc-developers/ldc/commit/798f73bd37308abc7aaef21e411f1615c4422022

But DMD may not have that luxury.

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