port 2491a639 (r26463)

original commit message:

   Externalize deoptimization reasons.
   1) The hardcoded strings were converted into DeoptReason enum.

   2) Deopt comment were converted into a pair location and deopt reason entries so
      the deopt reason tracking mode would less affect the size of the RelocInfo table and heap.

   3) DeoptReason entry in RelocInfo reuses kCommentTag value and generates short entry in RelocInfo table.

BUG=

Review URL: https://codereview.chromium.org/867243005

Cr-Commit-Position: refs/heads/master@{#26526}