Put all the tzdata in one file.

I'll come back and remove the separate files (and change the regular 'generate'
script) when the separate files are obsolete, but in the interim period, it's
easier to have both old and new files available.

Bug: 7012465
Change-Id: I36e2fd49c08ff79ded6eca1c5bc4c08837cc490a
3 files changed