build: Add variable for arch file suffix
build: Add variable for arch file suffix

Create a variable for the architecture settings file suffix.

Signed-off-by: James O. D. Hunt <348fbaadfbada55ea105602bf5609e23ac1c4898@intel.com>

devimc/runtime,clearcontainers/runtime,chavafg/runtime,clearcontainers/runtime,chavafg/runtime,devimc/runtime