ci: strip comments from the control file for dch's weak parser

scripts/ci/debsrcbuilder.sh

@@ -31,6 +31,10 @@ echo "changing directory to ${src_repo}/debbuild/${dst_full_name}"
 
 cd ${src_repo}/debbuild/${dst_full_name}
 (cd debian && ./bootstrap.sh)
+# dch can't handle comments in control file
+(cd debian; \
+  mv control control.orig; \
+  grep -e '^#' -v control.orig > control)
 # dependency: libparse-debcontrol-perl
 dch -v "${dst_full_version}-1" \
   -M --force-distribution -D "$distro" \