Updating OpenH264 to v1.7.0

DEPS

 # This file contains dependencies for WebRTC.
 
 vars = {
   'chromium_git': 'https://chromium.googlesource.com',
   'webrtc_git': 'https://webrtc.googlesource.com',
   'chromium_revision': '533744aa7772db7ede651fc9639d9598b3ee7420',
   'boringssl_git': 'https://boringssl.googlesource.com',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling swarming_client
   # and whatever else without interference from each other.
@@ skipping 51 matching lines @@
     Var('chromium_git') + '/chromium/llvm-project/compiler-rt/lib/fuzzer.git' + '@' +  Var('libfuzzer_revision'),
   'src/third_party/libjpeg_turbo':
     Var('chromium_git') + '/chromium/deps/libjpeg_turbo.git' + '@' + 'a1750dbc79a8792dde3d3f7d7d8ac28ba01ac9dd',
   'src/third_party/libsrtp':
    Var('chromium_git') + '/chromium/deps/libsrtp.git' + '@' + '1d45b8e599dc2db6ea3ae22dbc94a8c504652423',
   'src/third_party/libvpx/source/libvpx':
     Var('chromium_git') + '/webm/libvpx.git' + '@' +  '10bab1ec2966e0c22e80965b00b2a953a338880b',
   'src/third_party/libyuv':
     Var('chromium_git') + '/libyuv/libyuv.git' + '@' + '5b1af9a33545895ea12c52bf007f17914de19173',
   'src/third_party/openh264/src':
-    Var('chromium_git') + '/external/github.com/cisco/openh264' + '@' + '0fd88df93c5dcaf858c57eb7892bd27763f0f0ac',
+    Var('chromium_git') + '/external/github.com/cisco/openh264' + '@' + 'a180c9d4d6f1a4830ca9eed9d159d54996bd63cb',
   'src/third_party/openmax_dl':
     Var('webrtc_git') + '/deps/third_party/openmax.git' + '@' +  Var('openmax_dl_revision'),
   'src/third_party/usrsctp/usrsctplib':
     Var('chromium_git') + '/external/github.com/sctplab/usrsctp' + '@' + 'f4819e1b177f7bfdd761c147f5a649b9f1a78c06',
   'src/third_party/yasm/source/patched-yasm':
     Var('chromium_git') + '/chromium/deps/yasm/patched-yasm.git' + '@' + 'b98114e18d8b9b84586b10d24353ab8616d4c5fc',
   'src/tools':
     Var('chromium_git') + '/chromium/src/tools' + '@' + 'd37af930bfe66bce0e8282e854a637041ef40be2',
   'src/tools/gyp':
     Var('chromium_git') + '/external/gyp.git' + '@' + 'd61a9397e668fa9843c4aa7da9e79460fe590bfb',
@@ skipping 485 matching lines @@
 
 # The below rules will be removed when webrtc:4243 is fixed.
 specific_include_rules = {
   "video_receive_stream\.h": [
     "+call/video_receive_stream.h",
   ],
   "video_send_stream\.h": [
     "+call/video_send_stream.h",
   ],
 }