Debugger: record reloc info for debug break slot immediate before the slot.

Debugger: record reloc info for debug break slot immediate before the slot.

If we do it too early, we might get a constant pool between the reloc info
and the actual slot.

R=ulan@chromium.org

Committed: https://crrev.com/0a19e44925301b9c0a554bbec5e3fb5a6cd09efa
Cr-Commit-Position: refs/heads/master@{#29568}

[Yang, 2015-07-10 11:29:17]

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

[commit-bot: I haz the power, 2015-07-10 11:29:25]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1229673005/1

[ulan, 2015-07-10 11:30:45]

lgtm

[commit-bot: I haz the power, 2015-07-10 11:41:42]

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

[commit-bot: I haz the power, 2015-07-10 11:41:43]

Dry run: Try jobs failed on following builders:
  v8_linux_mipsel_compile_rel on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux_mipsel_compile_rel...)

[Yang, 2015-07-10 11:43:23]

The CQ bit was checked by yangguo@chromium.org

[Yang, 2015-07-10 11:43:24]

The patchset sent to the CQ was uploaded after l-g-t-m from ulan@chromium.org
Link to the patchset: https://codereview.chromium.org/1229673005/#ps20001
(title: "fix typo")

[commit-bot: I haz the power, 2015-07-10 11:43:30]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1229673005/20001

[commit-bot: I haz the power, 2015-07-10 12:47:22]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-07-10 12:47:33]

Patchset 2 (id:??) landed as
https://crrev.com/0a19e44925301b9c0a554bbec5e3fb5a6cd09efa
Cr-Commit-Position: refs/heads/master@{#29568}