Build: Add dependencies for the manifest tool

This patch adds dependencies for the manifest tool so that any change on
the files the manifest tool consumes will trigger the manifest tool to
re-run thus make the changes take effect.

Change-Id: I83e39b0f8330e0f1e89baa42eb29fa3d792615dc
Signed-off-by: Jason Guo <jason.guo@arm.com>
9 files changed