android-tools: fix build on big endian systems

This commit adds a patch to the android-tools package to make it build
properly on big-endian systems.

Fixes:

  http://autobuild.buildroot.net/results/1b8ace1a083b419c1ab913fda0d36a1d2d910f13/ (PowerPC)
  http://autobuild.buildroot.net/results/5bb304c91367f1570903c8c527b387c65e572e56/

 (Xtensa)

Cc: Gary Bisson <gary.bisson@boundarydevices.com>
Cc: Antoine Tenart <antoine.tenart@free-electrons.com>
Cc: Julien Corjon <corjon.j@ecagroup.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>