debian packaging: also in control (followup 07c3801)

Author: jef-n

debian/control

@@ -27,6 +27,7 @@ Build-Depends:
  python3-dev,
  python3-all-dev,
  python3-sip,
+ python3-sip-dev,
  python3-pyqt5,
  libosgearth-dev,
  git,