fix(static-checks.sh): regulate newly-added files detection check

This patch will ensure 'newly-added files detection' static check will
only run on the 'trusted-firmware' repository.
It will thereby resolve the 'tf-tftf-main' job from its failure as
'tf-a-tests' repository is not examined for coverity.

Signed-off-by: Jayanth Dodderi Chidanand <jayanthdodderi.chidanand@arm.com>
Change-Id: Ib5fa56629ec830dcab5cff9d7f6b948f5a403736
1 file changed