Fix `eggert/tz` at `tzdata2012j` release.

Set the `eggert/tz` to reference the `tzdata2012j` release. The shasum
of the `tzdata2012j` release is referenced in the [release
announcement](http://mm.icann.org/pipermail/tz/2012-November/018459.html)
posted to the tz listserv.

Closes #132.
Merge branch `tzdata2012j` into `master`.