Add Android version name and code to gyp settings.

Add the default name and version code for Android, the version name
and code can be overriden by changing the GYP_DEFINES.

BUG=154236


Review URL: https://chromiumcodereview.appspot.com/11029061

git-svn-id: http://src.chromium.org/svn/trunk/src/build@160522 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

common.gypi

@@ -933,6 +933,11 @@
     # we can build a debug version with acceptable size and performance.
     'android_full_debug%': 0,
 
+    # Sets the default version name and code for Android app, by default we
+    # do a developer build.
+    'android_app_version_name%': 'Developer Build',
+    'android_app_version_code%': 0,
+
     'sas_dll_exists': '<!(python <(DEPTH)/build/dir_exists.py <(sas_dll_path))',
     'wix_exists': '<!(python <(DEPTH)/build/dir_exists.py <(wix_path))',