epm repack postmaster: fix exec script

repack.d/portmaster.sh

@@ -15,11 +15,11 @@ remove_file $PRODUCTDIR/portmaster.desktop
 install -D -m644 .$PRODUCTDIR/portmaster_notifier.desktop ./usr/share/applications/portmaster_notifier.desktop
 remove_file $PRODUCTDIR/portmaster_notifier.desktop
 
-add_bin_exec_command
-cat <<EOF >usr/bin/$PRODUCT
+cat <<EOF | create_file /usr/bin/$PRODUCT
 #!/bin/sh
-$PRODUCTDIR/portmaster-start app --data=$PRODUCTDIR "\$@"
+exec $PRODUCTDIR/portmaster-start app --data=$PRODUCTDIR "\$@"
 EOF
+chmod a+x $BUILDROOT/usr/bin/$PRODUCT
 
 echo "Dowloading ... "
 .$PRODUCTDIR/portmaster-start --data $BUILDROOT$PRODUCTDIR update || fatal