[PATCH] Enable the Guile compiler

[Tom Tromey]

Jose> Does this work with the current way binutils Makefiles use to invoke
Jose> cgen, or it needs an accompanying binutils patch?

Yes, though I have a patch to somewhat simplify that as well.

This patch also seems to make things work fine with Guile 2.2.

Worth noting that the compiler speeds things up quite a bit, and Guile
3.0 seems to be even faster than 2.2.  So, it's worth using that if you
can.

Tom