NaCl: Update revision in DEPS, r9834 -> r9843

This pulls in the following Native Client changes:

r9835: (mseaborn) Debug stub tests: Add a test for writing memory
r9836: (mseaborn) Fix some spelling mistakes in comments in debug stub code
r9837: (mseaborn) Debug stub: Disallow the debugger from modifying code
r9838: (mseaborn) Remove the unused script tools/
r9839: (jfb) ARM validator: test all possible ARM instruction encodings
r9840: (mseaborn) Debug stub: Fix memory access bounds checks to account for range size
r9841: (phosek) When reverse setup is used, StartModule now waits for reverse channel initialization to prevent errors when reverse channel is being used before it is fully initialized.
r9842: (khim) Simplify MarkedInstruction constructor.
r9843: (shcherbina) Validator_ragel: get rid of autogenerated validator_x86_64_insruction_consts.c file


Review URL:

git-svn-id: svn:// 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/DEPS b/DEPS
index f99d82a..c1e19f3 100644
--- a/DEPS
+++ b/DEPS
@@ -12,7 +12,7 @@
   "chromium_git": "",
   "chromiumos_git": "",
   "swig_revision": "69281",
-  "nacl_revision": "9834",
+  "nacl_revision": "9843",
   # After changing nacl_revision, run 'glient sync' and check native_client/DEPS
   # to update other nacl_*_revision's.
   "nacl_tools_revision": "9330",  # native_client/DEPS: tools_rev