tflite: patcher: Initial skeleton for patch management

Adds the skeleton for the patch management script. Currently it parses
the archive url and patches from Bazel.

BUG=b:359512663
TEST=./script/patcher.py --debug eject

Change-Id: I6f104b47132f0334ee983d585c2d4d2cf8be62f1
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/tflite/+/5782534
Reviewed-by: Ching-Kang Yen <chingkang@chromium.org>
Tested-by: Shik Chen <shik@chromium.org>
Commit-Queue: Ching-Kang Yen <chingkang@chromium.org>
Auto-Submit: Shik Chen <shik@chromium.org>