The current Makefile only checks the primary python file, such as build.py and does...

The current Makefile only checks the primary python file, such as build.py and does not check other files in tool’s directory tree.
This modification adds all of the other files within the tool’s directory tree that would be a cause to rebuild the tool.

The format in the Makefile for listing these other files was selected to allow the nightly build script to detect changes in the additional files.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: lhauch <larry.hauch@intel.com>
Reviewed-by: Gao, Liming <liming.gao@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16103 6f19259b-4bc3-4df7-8a09-765794883524