kurento-buildpackage minor: use "+=" to append strings
kurento-buildpackage minor: use "+=" to append strings

DEB_BUILD_OPTIONS is a variable used by Debhelper and all dh_auto_*
tools (from the debian/rules file) and among other things canbe used to
limit parallelization of the build jobs.

This can be useful to run some CI jobs with explicitly disabled
parallelization.

Kurento/adm-scripts,Kurento/adm-scripts