Build: Enable ninja-based builds for ARMCLANG and IARARM

This is a port of 99c0a962, which only addressed GNUARM, for ARMCLANG
and IARARM.

Signed-off-by: TTornblom <thomas.tornblom@iar.com>
Change-Id: I67482b613732204a681ac50514a1017fa967bd98
4 files changed