[MIPS] Add build support for MIPS64 in libsrtp.

libsrtp.gyp

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'variables': {
     'use_system_libsrtp%': 0,
   },
   'target_defaults': {
     'defines': [
@@ skipping 39 matching lines @@
       ['target_arch=="arm" or target_arch=="armv7" or target_arch=="arm64"', {
         'defines': [
           # TODO(leozwang): CPU_RISC doesn't work properly on android/arm
           # platform for unknown reasons, need to investigate the root cause
           # of it. CPU_RISC is used for optimization only, and CPU_CISC should
           # just work just fine, it has been tested on android/arm with srtp
           # test applications and libjingle.
           'CPU_CISC',
         ],
       }],
-      ['target_arch=="mipsel"', {
+      ['target_arch=="mipsel" or target_arch=="mips64el"', {
         'defines': [
           'CPU_RISC',
         ],
       }],
     ],
     'direct_dependent_settings': {
       'include_dirs': [
         './config',
         'srtp/include',
         'srtp/crypto/include',
@@ skipping 21 matching lines @@
             # All Windows architectures are this way.
             'SIZEOF_UNSIGNED_LONG=4',
             'SIZEOF_UNSIGNED_LONG_LONG=8',
            ],
         }],
         ['target_arch=="x64" or target_arch=="ia32"', {
           'defines': [
             'CPU_CISC',
           ],
         }],
-        ['target_arch=="mipsel"', {
+        ['target_arch=="mipsel" or target_arch=="mips64el"', {
           'defines': [
             'CPU_RISC',
           ],
         }],
       ],
     },
   },
   'conditions': [
     ['use_system_libsrtp==0', {
       'targets': [
@@ skipping 255 matching lines @@
           'link_settings': {
             'libraries': [
               '-lsrtp',
             ],
           },
         }, # target libsrtp
       ], # targets
     }],
   ],
 }