ART: Optimize iteration of safepoints

The LiveInterval::Covers method is optimized for multiple calls with
non-decreasing positions. This patch reverts the order of iteration
over safepoints in RegisterAllocator::ConnectSiblings to capitalize
on this effect.

Change-Id: Ieb70eb9d5c0a06ee79379aab6c87cb3290c15bf7
1 file changed