buildsys: Simplify libc's ARCH_ list handling
buildsys: Simplify libc's ARCH_ list handling

Signed-off-by: Bernhard Reutner-Fischer <ce1ac9e9ad16abccd7821f371ad381197b4768ac@gmail.com>

ndmsystems/uClibc,ndmsystems/uClibc,ndmsystems/uClibc,ndmsystems/uClibc