oppo: Add OPPO R11/R11s

Change-Id: I2ee89a4ad349e78eabd3abf68d3e2e2eb58302e8
diff --git a/_oppo/oppor11.markdown b/_oppo/oppor11.markdown
new file mode 100644
index 0000000..a962e77
--- /dev/null
+++ b/_oppo/oppor11.markdown
@@ -0,0 +1,22 @@
+---
+layout: device
+title:  "OPPO R11"
+codename: R11
+downloadfolder: R11
+supportstatus: Current
+maintainer: Ethan Zuo
+oem: Oppo
+devicetree: https://github.com/TeamWin/android_device_oppo_R11
+---
+
+{% include disclaimer.html %}
+
+{% include supportstatus.html %}
+
+{% include appinstall.html %}
+
+{% include download.html %}
+
+{% include twrpinstall.html %}
+Note: You need to install ColorOS 6 or newer to use it.
+{% include fastbootinstall.html %}