This filename has some messed up bytes related to bi-directional script
that is included (Left-to-Right and Right-to-Left). GNU/Linux always
interprets filenames as pure byte sequences. Windows and OSX store
filenames as Unicode strings. So on OSX, the invalid filename gets
converted to a valid name. That works fine, but the test fails because it
is compared to a file generated on Ubuntu, where it preserves the byte
sequence.
This includes an APK with a valid Unicode filename that includes
bi-directional script.
`fdroid update` should be able to handle any valid filename (hopefully
aapt doesn't barf on them). To handle that, the environment where the
shell commands are run in needs to have a UTF-8 locale set. If LANG is
not set, things default to ASCII and UTF-8 filenames fail.
This also renames test APK with lots of Unicode chars as a test case.
closes#167
