now listing the actual correct dependancies

Working-on-Chrome-OS.md

@@ -18,7 +18,7 @@ Optionally, you could use **CMake** building system.
 #### Install required libraries
 For raylib to compile, you will need some additional libraries installed
 
-    sudo apt install mesa-common-dev libx11-dev libgl1-mesa-dev
+    sudo apt install libx11-dev xorg-dev
 
 ### Build raylib using make
 You can compile three different types of raylib library: