The common operator reducer was loosing feedback information
when replacing DeoptimizeIf/Unless with DeoptimizeUnless/If nodes.

Bug: v8:7127
Change-Id: I5d6f253ca9dfec04f4e7c8d1485f0ca668a8db95
Reviewed-on: https://chromium-review.googlesource.com/878781Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50782}