ARM: Avoid branches to branches

Generally speaking, this optimization applies to all code
generation visitors ending with a call to Bind(), which
includes intrinsics with kNoCall CallKind. However, no
changes are done for slow paths (which frequently end with
a branch to an exit label that is bound at the end of a
visitor).

Test: m test-art-target
Change-Id: Ie1a0c8c54ef76b01e7f0b23962c56c29ca8984a9