scripts/osmocom-packages-docker: pass OBS_SERVER

Make the variable available, as it's needed by the scripts that
osmocom-packages-docker.sh calls since
Ib271e16e93ebc58ed1ecb0ea881e1f1370e40928.

Change-Id: I8e53523b9b1ceafa45fe7b3dca2731d4e1c74959

scripts/osmocom-packages-docker.sh

@@ -27,6 +27,7 @@ esac
 docker run \
 	--rm \
 	-e "FEED=$FEED" \
+	-e "OBS_SERVER=$OBS_SERVER" \
 	-e "OSMO_OBS_CONFLICT_PKGVER=$OSMO_OBS_CONFLICT_PKGVER" \
 	-e "PACKAGES=$PACKAGES" \
 	-e "PROJ=$PROJ" \