[dev] add primitive keys state management (keys device)
diff --git a/dev/keys/rules.mk b/dev/keys/rules.mk
new file mode 100644
index 0000000..5f5b116
--- /dev/null
+++ b/dev/keys/rules.mk
@@ -0,0 +1,5 @@
+LOCAL_DIR := $(GET_LOCAL_DIR)
+
+OBJS += \
+	$(LOCAL_DIR)/keys.o
+