Please don't repack any of Forge's installers, it is not necessary.
We won't create a new installer just because your Java installation is broken.
Try JarFix
You know reobfJar doesn't prevent you from decompiling your mod and it doesn't completely obfuscate your mod, right?
It only reobfuscates what you use that is obfuscated in Minecraft.
This used to be a feature, it was removed when Mojang added "Installations" to the launcher.
This conversation has been had before, it will not be coming back because "Installations" supersedes it.