Fix typo in comment of make file

Change-Id: I0b19d8ea1c702e929c00a75b44a0bfefa75cd54a
diff --git a/Android.mk b/Android.mk
index 90f5b5f..9f9f277 100644
--- a/Android.mk
+++ b/Android.mk
@@ -35,5 +35,5 @@
 
 include $(BUILD_MULTI_PREBUILT)
 
-# Use the folloing include to make our test apk.
+# Use the following include to make our test apk.
 include $(call all-makefiles-under,$(LOCAL_PATH))