Fix build

Also remove unwanted binary files here

Change-Id: I1b52abbbfd3f67670fb5977f5430a1bb4dac22bb
diff --git a/ndk/Android.mk b/ndk/Android.mk
new file mode 100644
index 0000000..0c7e190
--- /dev/null
+++ b/ndk/Android.mk
@@ -0,0 +1 @@
+# Please this file empty. It is used to make the Android build system happy.