Rather than patching code, the deoptimizer now replaces the
return address in the frames with respective trampolines. 
This change required to change the way we search for Safepoint 
entries and for Exception Handlers. 
It's working in architectures: x64, ia32, arm, arm64 and mips. 

Bug: V8:6563
Change-Id: I3cbd4d192c3513f307b3a6a2ac99e60d03c753d3
Reviewed-on: https://chromium-review.googlesource.com/586707
Commit-Queue: Juliana Patricia Vicente Franco <jupvfranco@google.com>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46967}