Make android_apk template actually create an apk

build/config/android/config.gni

Index: build/config/android/config.gni
diff --git a/build/config/android/config.gni b/build/config/android/config.gni
index 819fe4d7efa3f39507167c11a7775da70e9a4448..d7026d0a5c0252303509d8bbd9497c80e7ceb5f5 100644
--- a/build/config/android/config.gni
+++ b/build/config/android/config.gni
@@ -16,6 +16,10 @@ if (is_android) {
     # system, using the 'android' gyp backend. The WebView code is still built
     # when this is unset, but builds using the normal chromium build system.
     is_android_webview_build = false
+
+    android_default_keystore_path = "//build/android/ant/chromium-debug.keystore"
+    android_default_keystore_name = "chromiumdebugkey"
+    android_default_keystore_password = "chromium"
   }
 
   if (is_android_webview_build) {
@@ -23,6 +27,7 @@ if (is_android) {
            "You must specify android_src for an Android WebView build.")
   }
 
+
   # Host stuff -----------------------------------------------------------------
 
   # Defines the name the Android build gives to the current host CPU
@@ -62,6 +67,8 @@ if (is_android) {
   # Path to the SDK's android.jar
   android_sdk_jar = "$android_sdk/android.jar"
 
+  zipalign_path = "$android_sdk_build_tools/zipalign"
+
   # Subdirectories inside android_ndk_root that contain the sysroot for the
   # associated platform.
   _android_api_level = 14