Update TOOL_REVISIONS for PNaCl 12372->12398

Update TOOL_REVISIONS for PNaCl 12372->12398

Command-line specified PNaCl change:
  git svn id:       12398
  hash:             3fb8e1cf83379d2c52b01f768fb87cef289d1dcc
  author:           jfb@chromium.org
  date:             2013-11-18 16:43:05 +0000
  subject:          Build libc++ biased bitcode.
  bug:              https://code.google.com/p/nativeclient/issues/detail?id=3623
  test:             ./pnacl/scripts/llvm-test.py --libcxx-tests
  review url:       https://codereview.chromium.org/73693005
  reviewers:        dschuff@chromium.org
  body:
  ============================================================================
  This allows us to eventually make libc++ the default C++ library: the IRT requires the biased build.
  ============================================================================

TOOL_REVISIONS update points at PNaCl version:
  git svn id:       12372
  hash:             f515a52b280938f902bbbafd7861c8d260d798fd
  date:             2013-11-09 05:32:42 +0000
  subject:          PNaCl: Update LLVM revision in pnacl/COMPONENT_REVISIONS
  commits since:    28

Most recent TOOL_REVISIONS update:
  hash:             ba3111a6ea685c5501ccebf6e36b861f17ce3bfa
  author:           nfullagar@google.com
  date:             2013-11-13 19:12:51 +0000
  subject:          Revert 12382 "Deploy new x86 binutils"
  commits since:    15

R=dschuff@chromium.org, jfb@chromium.org

Committed: https://src.chromium.org/viewvc/native_client?view=rev&revision=12401

[Derek Schuff, 2013-11-18 20:30:42]

lgtm

[JF, 2013-11-18 20:35:56]

Valgrind failures look like the usual.

[JF, 2013-11-18 20:36:46]

Committed patchset #1 manually as r12401 (presubmit successful).