Roll android_tools 2a860d8:fd5a8ec

Rolls in two CLs on Android tools:

1) Add aarch64 gold linker:
  https://chromium-review.googlesource.com/247060
2) Remove proguarding from GMS core
  https://chromium-review.googlesource.com/247611

BUG=None

Review URL: https://codereview.chromium.org/906363002

Cr-Commit-Position: refs/heads/master@{#315375}

DEPS

@@ -441,7 +441,7 @@ deps_os = {
      Var('chromium_git') + '/external/android_protobuf.git' + '@' + '94f522f907e3f34f70d9e7816b947e62fddbb267',
 
     'src/third_party/android_tools':
-     Var('chromium_git') + '/android_tools.git' + '@' + '2a860d82034c46892ae8e1c8898d8359d2b4bf2f',
+     Var('chromium_git') + '/android_tools.git' + '@' + 'fd5a8ec0c75d487635f7e6bd3bdc90eb23eba941',
 
     'src/third_party/apache-mime4j':
      Var('chromium_git') + '/chromium/deps/apache-mime4j.git' + '@' + '28cb1108bff4b6cf0a2e86ff58b3d025934ebe3a',