PabloMK7: Changes the Vec4 dot operation to use NEON intrinsics on ARM devices.
This function is used every time a triangle is added to the rendered, so it can be considered hot code. The other vector operations are not used as much, so there is no gain to provide NEON operations for them.
The improvements from this change are most likely minimal.
Co-authored-by: PabloMK7 <hackyglitch2@gmail.com>
