[Tails-dev] [review'n'merge:1.2.2] test/8359-check-po

Hi,

in the same vein as #8360, here's now PO checking in our automated
test suite, so that we check PO files in other branches than
master too. One small commit, only adds stuff to the test suite
=> candidate for 1.2.2.

Cheers,
--
intrigeri