bug 567858 - Allow installation to SD card in Android 2.2 r=blassey

embedding/android/AndroidManifest.xml.in

@@ -2,6 +2,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
       package="org.mozilla.@MOZ_APP_NAME@"
+      android:installLocation="auto"
       android:versionCode="1"
       android:versionName="1.9.3"
       android:sharedUserId="org.mozilla.sharedID">