Mozilla test status: Assign bug number to quadratic assembler arm64 issue & misc regexp cleanup

R=marja@chromium.org
BUG=

Review URL: https://codereview.chromium.org/810053002

Cr-Commit-Position: refs/heads/master@{#25873}
[turbofan] Also run MachineOperatorReducer in SimplifiedLoweringPhase.

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/809313002

Cr-Commit-Position: refs/heads/master@{#25874}