Bug#814149: add alternative for /usr/bin/dx

[Hans-Christoph Steiner]

Package: dx
Version: 1:4.4.4-8
Severity: wishlist

We have just packaged the "Dalvik Explorer" aka android-platform-dalvik
which is always used as the command util 'dx'.  This conflicts with
OpenDX's /usr/bin/dx, so I propose that OpenDX support /usr/bin/dx using
the 'alternatives' system.  To do that, the actual /usr/bin/dx binary
should be renamed to something else, like '/usr/bin/opendx', then the
'dx' package can claim '/usr/bin/dx' using the alternatives command.

Its quite simple, see how I did it in android-platform-dalvik here:

https://anonscm.debian.org/cgit/android-tools/android-platform-dalvik.git/commit/?id=e0ee10efaca3c0b5db0cac1b2d913ec11c0081b3