Coverity: silence make output

Avoids stdout's cluttering. Also create a variable to hold common
flags for all platforms (fvp and juno) and include it in those targets
without common tags.

Change-Id: I860117c53230d140f62b13590d4255d81a461379
Signed-off-by: Leonardo Sandoval <leonardo.sandoval@linaro.org>
1 file changed