Add Huami OEM.

Change-Id: I8dbd259d097bd43df05de1f47bb35c100644860f
diff --git a/_oem/huami.markdown b/_oem/huami.markdown
new file mode 100644
index 0000000..bafdd97
--- /dev/null
+++ b/_oem/huami.markdown
@@ -0,0 +1,4 @@
+---
+layout: device
+oem: Huami
+---