licensing: Add licenses we were missing and catch more exceptions.
licensing: Add licenses we were missing and catch more exceptions.

Found a bug that happened if you didn't run eclean, so added an
exception for the bug (package is marked as upgrade), and improved
comments to explain eclean should be run.

Remind the submitter to use Publish+Mail in the svn interface.

Added regex support for licenses, and manually inspected the diff to
verify we do get more licenses than we used to.

Fixed typo on the override of chromeos-chrome.

BUG=chromium:197970 chromium:271812
TEST=Ran licensing, inspected the new output, confirmed we have new
licenses only.

Change-Id: Iffe08d67b25e37cecdd2549dda8c6f0ac61dc073
Reviewed-on: https://chromium-review.googlesource.com/189392
Reviewed-by: Marc MERLIN <7073d0fab1ea36cd0c0f1f603a2a5e44b931b31c@chromium.org>
Tested-by: Marc MERLIN <7073d0fab1ea36cd0c0f1f603a2a5e44b931b31c@chromium.org>

chadversary/chromiumos.chromite,bpsinc-native/src_third_party_chromite,chadversary/chromiumos.chromite,bpsinc-native/src_third_party_chromite,bpsinc-native/src_third_party_chromite