Update LLVM revision in pnacl/DEPS. Pulls in:

a70a76d Unbreak the Windows/Cygwin toolchain build after the 3.3 merge. [eliben@chromium.org]
87de224b Cherrypick upstream ARM FastISel ext patches [jfb@chromium.org]
0b41f88 Enable ability to have multiple PNaCl wire format versions. [kschimpf@google.com]

BUG=None
R=dschuff@chromium.org

Review URL: https://codereview.chromium.org/19508004

git-svn-id: svn://svn.chromium.org/native_client/trunk/src/native_client@11829 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2
Add @spec section to lots of targeted validator tests.

In all these cases, error offsets in @rdfa_output and @spec match. To ensure it, this CL was obtained by running

python src/trusted/validator_ragel/spec_comparer.py

(this script is included in this CL as well)

BUG= https://code.google.com/p/nativeclient/issues/detail?id=3453
TEST= this, on bots
R=halyavin@google.com

Review URL: https://codereview.chromium.org/19651003

git-svn-id: svn://svn.chromium.org/native_client/trunk/src/native_client@11830 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2