lts-release-mail.py: Add --url and --branch params

--url is mostly for testing (e.g. Jenkins sandboxing), --branch (actually,
prefix) is to make --latest work across multiple LTS branches.

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: I83d8da2c1c0b1de7ded7e8d15634a8ce353364d7
1 file changed