Thunderbird Build 1

• (TB Drivers) Ship the l10n milestone
• (TB Drivers) Submit to Ship It
• Publish in Balrog (see notes below)
• Post-release tasks

Don't ship to RTL locales

Due to bug 1150021, we don't want to ship 38 to RTL locales. Accomplished by:

• set up test rule on beta-cdntest at higher priority
• verfified that worked
• added rule for beta

Additional post balrog steps needed

• delete beta-cdntest rule for RTL to not block 38 b2