Roll libsrtp b8dd754:8a7662a

Picks up https://codereview.chromium.org/1557633002/

BUG=573250
TBR=jiayl@chromium.org

Review URL: https://codereview.chromium.org/1553793002

Cr-Commit-Position: refs/heads/master@{#367208}

DEPS

@@ -193,7 +193,7 @@ deps = {
     Var('chromium_git') + '/external/github.com/sctplab/usrsctp' + '@' + 'c60ec8b35c3fe6027d7a3faae89d1c8d7dd3ce98',
 
   'src/third_party/libsrtp':
-   Var('chromium_git') + '/chromium/deps/libsrtp.git' + '@' + 'b8dd754b4fa05fd4cf1c2e8dc3b1ac976280e41a', # from svn revision 295151
+   Var('chromium_git') + '/chromium/deps/libsrtp.git' + '@' + '8a7662a400df7bdb0dc5cb7c0bf890dfa3481295', # from svn revision 295151
 
   'src/third_party/yasm/source/patched-yasm':
    Var('chromium_git') + '/chromium/deps/yasm/patched-yasm.git' + '@' + '4671120cd8558ce62ee8672ebf3eb6f5216f909b',