MIPS64: Fix MIPS64 related issues in GN files

third_party/libvpx/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/arm.gni")
 import("//build/config/android/config.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 import("//third_party/libvpx/libvpx_srcs.gni")
 import("//third_party/yasm/yasm_assemble.gni")
 
@@ skipping 254 matching lines @@
   if (is_nacl) {
     sources = libvpx_srcs_generic
   } else if (current_cpu == "x86") {
     sources = libvpx_srcs_x86
   } else if (current_cpu == "x64") {
     if (is_msan) {
       sources = libvpx_srcs_generic
     } else {
       sources = libvpx_srcs_x86_64
     }
-  } else if (current_cpu == "mipsel") {
+  } else if (current_cpu == "mipsel" || current_cpu == "mips64el") {
     sources = libvpx_srcs_mips
   } else if (current_cpu == "arm") {
     if (arm_use_neon) {
       sources = libvpx_srcs_arm_neon
     } else if (is_android) {
       sources = libvpx_srcs_arm_neon_cpu_detect
     } else {
       sources = libvpx_srcs_arm
     }
   } else if (current_cpu == "arm64") {
@@ skipping 21 matching lines @@
   }
   if (is_android) {
     deps += [ "//third_party/android_tools:cpu_features" ]
   }
   if (current_cpu == "arm") {
     deps += [ ":libvpx_assembly_arm" ]
   }
 
   public_configs = [ ":libvpx_external_config" ]
 }