Roll libyuv r1691 for C99 types.

Switch types to C99 int8_t etc
Types are defined in basic_types.h
Also optimizes I420ToAR30 26% faster

92e22cf Lint cleanup after C99 change CL
f1c5345 Define basic_types backward compatible layer
7e38988 Switch to C99 types
13771ff basic_types.h - remove unused macros
a11ffa1 NV12 format documentation added.
8af6ea4 I420ToAR30 in 1 step SSSE3 assembly

Bug: 797347, libyuv:774, libyuv:751
Test: try bots passed for local libyuv build

Change-Id: If1060f71882886c237a46e1bb7791e3f5f419073
Reviewed-on: https://chromium-review.googlesource.com/881922Reviewed-by: Miguel Casas <mcasas@chromium.org>
Commit-Queue: Miguel Casas <mcasas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#531693}

DEPS

@@ -487,7 +487,7 @@ deps = {
     Var('chromium_git') + '/webm/libwebm.git' + '@' + 'b03c65468b06d097f27235d93d76bfc45f490ede',
 
   'src/third_party/libyuv':
-    Var('chromium_git') + '/libyuv/libyuv.git' + '@' + '09db0c4ce2008008f73b247f1a5b64cfbb29b72e',  # from r1690
+    Var('chromium_git') + '/libyuv/libyuv.git' + '@' + '92e22cf5b66173d5d5056751ca62bc2254e4ff86',  # from r1691
 
   'src/third_party/lighttpd': {
       'url': Var('chromium_git') + '/chromium/deps/lighttpd.git' + '@' + Var('lighttpd_revision'),