Add 64-bit transition data support to debug tool

The dump-tzdata.py tool now dumps the 64-bit section as well as the
32-bit section.

Bug: 73719425
Test: ran ./dump-tzdata.py -tzdata ../../output_data/iana/tzdata -output /tmp/2019a
Change-Id: I389f0838a7b1b5416a4b40f46ab3011f74f63928
1 file changed