[turbofan] Further reduction of Word32And with Int32Add.

- (y * (K << L) + x) & (-1 << L) => (x & (-1 << L)) + y * (K << L)
- (x + y * (K << L)) & (-1 << L) => (x & (-1 << L)) + y * (K << L)

TEST=unittests
R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/811293002

Cr-Commit-Position: refs/heads/master@{#25875}
Add script to check for clusterfuzz issues.

BUG=443153
LOG=n
NOTRY=true

Review URL: https://codereview.chromium.org/811073002

Cr-Commit-Position: refs/heads/master@{#25876}
Crash with an error message when ICU data files are missing

Before, we'd just crash.

BUG=v8:3348
R=svenpanne@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/807313003

Cr-Commit-Position: refs/heads/master@{#25877}