Assign more bits to safepoint table offset.

Assign more bits to safepoint table offset.

1 << 24 is apparently not large enough for some optimized code.

R=jkummerow@chromium.org
BUG=v8:4272
LOG=N

Committed: https://crrev.com/39bcda21ff3c1fd106f3bf501e57c9fc96620a17
Cr-Commit-Position: refs/heads/master@{#29909}

[Yang, 2015-07-29 14:51:24]

The CQ bit was checked by yangguo@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2015-07-29 14:51:34]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1265663002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1265663002/1

[commit-bot: I haz the power, 2015-07-29 15:00:05]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-07-29 15:00:06]

Dry run: Try jobs failed on following builders:
  v8_linux_gcc_compile_rel on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux_gcc_compile_rel/bu...)

[Jakob Kummerow, 2015-07-29 16:19:38]

LGTM.

Thankfully the STATIC_ASSERT on the next line says that this change is safe :-)

[Yang, 2015-07-30 06:03:55]

The CQ bit was checked by yangguo@chromium.org

[Yang, 2015-07-30 06:03:55]

The patchset sent to the CQ was uploaded after l-g-t-m from
jkummerow@chromium.org
Link to the patchset: https://codereview.chromium.org/1265663002/#ps20001
(title: "change to 30")

[commit-bot: I haz the power, 2015-07-30 06:04:10]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1265663002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1265663002/20001

[commit-bot: I haz the power, 2015-07-30 08:17:19]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-07-30 08:17:41]

Patchset 2 (id:??) landed as
https://crrev.com/39bcda21ff3c1fd106f3bf501e57c9fc96620a17
Cr-Commit-Position: refs/heads/master@{#29909}