NaCl: Update revision in DEPS, r12757 -> r12770

This pulls in the following Native Client changes:

r12758: (dschuff) llvm-test.py: Use msys make when running regression tests on Windows
r12759: (mcgrathr) Give sel_ldr an option (-d) to raise a no-op signal at startup
r12761: (dyen) Removed extra TLS flags passed into our toolchain
r12762: (mcgrathr) Update chrome_rev to current LKGR
r12763: (mcgrathr) Update tools_rev in DEPS
r12765: (mcgrathr) toolchain_build: Use new version of isl
r12766: (teravest) Remove Log() in ReverseService.
r12767: (bradnelson) Switching perf graph units to "standard" units.
r12768: (mseaborn) Remove unused code relating to a never-finished ARM Thumb sandbox
r12769: (bradnelson) Fixing escaping issue in r12768.
r12770: (jvoung) Update TOOL_REVISIONS for PNaCl r12737->r12765

BUG=none
TEST=nacl_integration
NOTRY=true
(ran try jobs already)

Review URL: https://codereview.chromium.org/163433009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251423 0039d316-1c4b-4281-b951-d872f2087c98

DEPS

@@ -28,10 +28,10 @@ vars = {
   "chromiumos_git": "https://chromium.googlesource.com/chromiumos",
   "skia_git": "https://skia.googlesource.com",
   "swig_revision": "230490",
-  "nacl_revision": "12757",
+  "nacl_revision": "12770",
   # After changing nacl_revision, run 'glient sync' and check native_client/DEPS
   # to update other nacl_*_revision's.
-  "nacl_tools_revision": "12655",  # native_client/DEPS: tools_rev
+  "nacl_tools_revision": "12760",  # native_client/DEPS: tools_rev
   "google_toolbox_for_mac_revision": "616",
   "libaddressinput_revision": "176",
   "libphonenumber_revision": "621",