message: create_deb: get require syntax right
diff: @@ -17,7 +17,7 @@ sudo checkinstall \
  --pkgarch="amd64" \
  --pkgrelease=1 \
  --pkglicense="BSD-3-clause" \
  - --requires="libcurl4-openssl-dev libtinyxml2-dev" \
  + --requires="libcurl4-openssl-dev,libtinyxml2-dev" \
  --provides="dronecore-dev" \
  --backup=no \
  --deldoc=yes \
  