build(generator): add flag that forces hydration
build(generator): add flag that forces hydration

This is useful when testing a different commit, but we are sure that
there have not been any changes to the generator/templates.

LWJGL-CI/lwjgl3,code-disaster/lwjgl3,TheMrMilchmann/lwjgl3,TheMrMilchmann/lwjgl3,code-disaster/lwjgl3,code-disaster/lwjgl3,LWJGL-CI/lwjgl3,TheMrMilchmann/lwjgl3,LWJGL/lwjgl3,LWJGL/lwjgl3,LWJGL/lwjgl3,LWJGL/lwjgl3,TheMrMilchmann/lwjgl3,LWJGL-CI/lwjgl3,LWJGL-CI/lwjgl3,code-disaster/lwjgl3