android: When debugging, the installLocation must be "internalOnly".

Otherwise the gdbserver ends up with

run-as: exec failed for /data/data/org.libreoffice/lib/gdbserver Error:Permission denied

(you need to run ndk-gdb with --verbose to see that).

Change-Id: Iccdf0ff268c20d2fb5abc1e93404375fa51c1cf1