Build instructions for linux/arm64

[CITIZENDOT]

Are there any different instructions to build for linux/arm64 architecture?

meshoptimizer/CMakeLists.txt

Lines 124 to 126 in 6d0d7ec

	if(NOT MSVC AND CMAKE_HOST_SYSTEM_PROCESSOR STREQUAL "x86_64")
	set_source_files_properties(gltf/basislib.cpp PROPERTIES COMPILE_OPTIONS -msse4.1)
	endif()

I think this cmake only targets linux/amd64 architecture.

[zeux]

Should build out of the box I think, at least macOS/arm64 just works.