Fix missing quotes when testing for OUTPUTDIR existance

Signed-off-by: Diego Pasqualin <dpasqualin@c3sl.ufpr.br>

create-iso-jenkins.sh

@@ -20,7 +20,7 @@ OUTPUT="$OUTPUTDIR/$BASENAME-$DNAME-$REPO-i386-$DATE.iso"
 # Jenkins like to create directory names with spaces...
 cd "$PREFIX"
 
-test ! -d $OUTPUTDIR && mkdir -p $OUTPUTDIR
+test ! -d "$OUTPUTDIR" && mkdir -p "$OUTPUTDIR"
 
 sudo ./create-iso.sh --all "iso/$ISO" \
                      --dist "$DIST" \