Add missing Android GN build dep on md5sum.

build/config/android/internal_rules.gni

 # 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/android/config.gni")
 
 assert(is_android)
 
 rebased_android_sdk = rebase_path(android_sdk, root_build_dir)
 rebased_android_sdk_root = rebase_path(android_sdk_root, root_build_dir)
@@ skipping 767 matching lines @@
         invoker.extensions_to_not_compress,
       ]
     }
   }
 
   package_target = "${target_name}__package"
   package_apk(package_target) {
     deps = []
     forward_variables_from(invoker, [ "deps" ])
     deps += [ ":${_package_resources_target_name}" ]
+    deps += [ "//tools/android/md5sum" ]  # Used when deploying APKs

[agrieve, 2015/09/01 19:29:39]

nit: make this a data_dep, since it doesn't need to be built before the target
itself.

 
     if (defined(_dex_path)) {
       dex_path = _dex_path
     }
     native_libs_dir = _native_libs_dir
     output_apk_path = _packaged_apk_path
     resource_packaged_apk_path = _resource_packaged_apk_path
   }
 
   _incremental_package_target = "${target_name}_incremental__package"
@@ skipping 819 matching lines @@
     ]
     args = [
       "--depfile",
       rebase_path(depfile, root_build_dir),
       "--script-output-path",
       rebase_path(generated_script, root_build_dir),
     ]
     args += test_runner_args
   }
 }