Fix oatdump to dump the right code bytes.
Fix oatdump to dump the right code bytes.

I used the wrong bound for finding the end address, and just dumping
plain bytes is far more useful. These bytes can be filtered through
"llvm-mc -disassemble -triple=thumbv7-unknown-linux" to get mostly-readable
disassembly (it doesn't seem to cope with the single-register PUSH our
methods start with, but gets in sync).

Change-Id: Ic7e07f1330b352110a4517c1939ec7c11ae65e0a

treadstoneproject/artinst,treadstoneproject/artinst,treadstoneproject/artinst,treadstoneproject/artinst,treadstoneproject/artinst