android-11 : added device markdown and oem tecno

Change-Id: I8fe8590869ba9287273bccf1e6c03977749bdd98
diff --git a/_oem/tecno.markdown b/_oem/tecno.markdown
new file mode 100644
index 0000000..f10a0dd
--- /dev/null
+++ b/_oem/tecno.markdown
@@ -0,0 +1,4 @@
+---
+layout: device
+oem: Tecno
+---