Define SDK version for compiling LittleMock

Change-Id: I17a6d945ec6be374453f8e17c27ed747c3c4e5b7
diff --git a/Android.mk b/Android.mk
index 989fc4c..3f7dbaf 100644
--- a/Android.mk
+++ b/Android.mk
@@ -18,6 +18,8 @@
 # Include all the java files.
 LOCAL_SRC_FILES := $(call all-java-files-under, src)
 
+LOCAL_SDK_VERSION := 14
+
 # The name of the jar file to create.
 LOCAL_MODULE := littlemock