Correctly identify the aarch64 kernel's signal trampoline.

This was misfiring because it was seeing a "corrected" PC that pointed
to the nop before the mov that's the first instruction in the trampoline.

Bug: 17436734

(cherry picked from commit 6d90028ee35b7028004e5a4f39ffa55dd0fbd6de)

Change-Id: I86abd5c49668e3f6694837b9a780d537c4c7a2f1
1 file changed