Exclude from Mac build.

The code doesn't build on Mac.
Temporarily exclude this project from Mac builld.

Change-Id: Ibfd8a3ca804f463425247f27c709cf46be6ffdd8
diff --git a/Android.mk b/Android.mk
index f5f1064..fd6d109 100644
--- a/Android.mk
+++ b/Android.mk
@@ -1,5 +1,5 @@
 # Recursive call sub-folder Android.mk
 #
-
+ifeq ($(HOST_OS),linux)
 include $(call all-subdir-makefiles)
-
+endif