*: Fix icons not present in the generated .deb
Closes: #2352 (closed).
Perform a recursive glob with '**' when performing search files to installed from static folder so that icons files are found and installed as extra package data.
Tests:
- Build a .deb package and confirm that none of the icons files have been installed into /usr/lib/python3/dist-packages/plinth directory. With the fix, rebuild the package and confirm that .png and .svg files are present at least some plinth/modules//static/icons/ path.
Signed-off-by: Sunil Mohan Adapa sunil@medhas.org