Move build and tests for x86 to avx2 machines.
Set CFLAGS on Autotools build and move to AVX2 machine Set PRESUME_AVX2 on CMakae and move to AVX2 machine Move Meson X86 to AVX2 machine.
(Setting up AVX2 support for Meson will be done in another PR)
Set CFLAGS on Autotools build and move to AVX2 machine Set PRESUME_AVX2 on CMakae and move to AVX2 machine Move Meson X86 to AVX2 machine.
(Setting up AVX2 support for Meson will be done in another PR)