generic-x needs to require generic

[Luc Teirlinck]

What is the purpose of the following change to generic-x, which breaks
bootstrapping:

        * generic-x.el: Don't prevent compilation.  Don't require generic.
        Follow coding conventions.  Minor code cleanup.

I am referring to the "Don't require generic." part.  Undoing that
part solves the following problem during bootstrapping:

generic-x.el:767:8:Error: Symbol's function definition is void:
generic-make-keywords-list
make[1]: *** [compile] Error 1
make[1]: Leaving directory `/home/teirllm/emacscvsdir/emacs/lisp'
make: *** [bootstrap-build] Error 2

Sincerely,

Luc.