Remove CFLAGS -mcpu=native and -mtune=native
Remove CFLAGS -mcpu=native and -mtune=native

To avoid architecture specific issues with these flags when binary releases
are built from source code.

Signed-off-by: Dorinda Bassey <a8f71cd1ec410802782ddddcc9adfd0ca8144fd7@redhat.com>

mikesart/gpuvis,mikesart/gpuvis,mikesart/gpuvis