[turbofan] Further reduction of Word32And with Int32Add.

[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

Committed: https://crrev.com/0925be14a28354bc2b85a82598f3de78f17a15eb
Cr-Commit-Position: refs/heads/master@{#25875}

[Benedikt Meurer, 2014-12-18 08:31:50]

PTAL

[Sven Panne, 2014-12-18 08:40:20]

lgtm

[Benedikt Meurer, 2014-12-18 08:43:05]

Committed patchset #1 (id:1) manually as
0925be14a28354bc2b85a82598f3de78f17a15eb (presubmit successful).

[commit-bot: I haz the power, 2014-12-18 18:05:14]

Patchset 1 (id:??) landed as
https://crrev.com/0925be14a28354bc2b85a82598f3de78f17a15eb
Cr-Commit-Position: refs/heads/master@{#25875}