Fix oatdump off-by-one
Fix oatdump off-by-one

The dump of the pc <-> dex mapping tables was broken by the
recent mapping table restructuring change.  Fixed now.

Change-Id: I36c869e4a2853e18e021268b5b4eb49a4b76c970

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