Update the script to find outdated constraints and update them. It
depends on having a copy of the right branch of the requirements repo
already checked out, but it clones the other projects itself and then
edits the constraints file.
Change-Id: Idfacbc937adc7c70fe4505b47fe380e850f1899f
Signed-off-by: Doug Hellmann <doug@doughellmann.com>
Look at all of the managed libraries and compare their most recent tag
against the version in the constraints file.
Change-Id: I273141ce50663e909f7e145ba81c737b82637c3b