Windows SE build shows warning while checking JFB switch in the build process.
if [ = true ]; then
For SE build J4B env variable is not set which is legitimate, leaving it a blank. J4B variable need to be check for value in SE build.
During JFB switching in the build process, Makefile throws warning msg.
We need to place this JFB checking withing a quote.
if [ "X$(J4B)" = "Xtrue" ]; then