Fix install/upgrade command references

src/cdist-install.rst

@@ -50,7 +50,7 @@ create version.py:
 
 .. code-block:: sh
 
-    make version
+    ./bin/build-helper version
 
 Then, as usual, you execute the following command:
 

src/cdist-upgrade.rst

@@ -11,7 +11,7 @@ To upgrade cdist in the current branch use
     git pull
 
     # Also update the manpages
-    ./build man
+    make man
     export MANPATH=$MANPATH:$(pwd -P)/doc/man
 
 If you stay on a version branche (i.e. 1.0, 1.1., ...), nothing should break.