Roll android_tools

This picks up a single change:
6fc0e1a090 Fix gyp targets
http://git.chromium.org/gitweb/?p=android_tools.git;a=commit;h=6fc0e1a090e97805a70f0e65377a9db4db3db8f5

Review URL: https://codereview.chromium.org/298653006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@272338 0039d316-1c4b-4281-b951-d872f2087c98

DEPS

@@ -517,7 +517,7 @@ deps_os = {
   "android": {
     "src/third_party/android_tools":
       Var("chromium_git") + "/android_tools.git" +
-      "@7de460f062350105c3eb284cdc6948ff50e1f6e1",
+      "@6fc0e1a090e97805a70f0e65377a9db4db3db8f5",
 
     "src/third_party/aosp":
       "/trunk/deps/third_party/aosp@148330",