Android: update project to SDKv11

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29561 a1c6a512-1295-4272-9138-f99709370657
diff --git a/android/default.properties b/android/default.properties
index 0b9250e..510b090 100644
--- a/android/default.properties
+++ b/android/default.properties
@@ -8,4 +8,4 @@
 # project structure.
 
 # Project target.
-target=android-8
+target=android-11