Create Building-a-Custom-Debian-Package.rst (#3324) (#3326)

added required packages to build a python-package

(cherry picked from commit 1843bd3)

Co-authored-by: Nikolas Engelhard <[email protected]>

Author: mergify[bot]

source/How-To-Guides/Building-a-Custom-Debian-Package.rst

@@ -24,7 +24,7 @@ Run the following command to install utilities needed for the build:
 
 .. code:: bash
 
-  $ sudo apt install python3-bloom python3-rosdep fakeroot
+  $ sudo apt install python3-bloom python3-rosdep fakeroot debhelper dh-python
 
 Initialize rosdep
 -----------------