Gello: don't break build

Change-Id: Ia4969d4528a631907f7f5448850c7535d7fa9a3e
Signed-off-by: jrizzoli <joey@cyanogenmoditalia.it>
diff --git a/Android.mk b/Android.mk
index 138550e..9becb60 100644
--- a/Android.mk
+++ b/Android.mk
@@ -1,3 +1,5 @@
+ifeq ($(WITH_GELLO_SOURCE),true)
+
 LOCAL_PATH:= $(call my-dir)
 include $(CLEAR_VARS)
 
@@ -76,4 +78,6 @@
 endif
 
 # additionally, build tests in sub-folders in a separate .apk
-include $(call all-makefiles-under,$(LOCAL_PATH))
\ No newline at end of file
+include $(call all-makefiles-under,$(LOCAL_PATH))
+
+endif