Build instructions: `cd ../contrib` -> `cd contrib`

The build instructions pointed to a wrong location of the `contrib`
directory

Change-Id: I6d4700099978e3c4fb2980819a03e8b94ba655ed
Tuleap: #638

docs/source/compiling_and_installing/daemon.rst

@@ -9,7 +9,7 @@ Linux
 
 .. code-block:: bash
 
-    cd ../contrib/
+    cd contrib
     mkdir native
     cd native
     ../bootstrap