Fix website docu.

doc/Build.txt

@@ -27,14 +27,6 @@ sudo make install
 You can replace `--prefix=/usr` by whatever prefix you like. Make sure to
 also change this value in the next steps.
 
-Run:
-
---------------------------------------
-./configure --prefix=/usr --with-debug
---------------------------------------
-
-to enable debug mode.
-
 NOTE: If you have `colorgcc`, configure will *fail* on `libeXpat`. Issue an `unset CC` and `unset CXX` to build the dbus bindings.
 
 
@@ -78,6 +70,14 @@ make
 sudo make install
 ---------------------------------------------------
 
+Run:
+
+--------------------------------------
+./configure --prefix=/usr --with-debug
+--------------------------------------
+
+to enable debug mode.
+
 
 sflphone-qt
 -----------
@@ -98,6 +98,8 @@ make
 sudo make install
 -------------------------
 
+Here again, run `./configure` with `--with-debug` to enable debugging mode.
+
 NOTE: You may need to run `autoreconf --install` before the `configure` script.
 
 You'll find `gnome-autogen.sh` in some `gnome-common`-like package of