release_1-9-12

[rixed]

I tested it on the various hardware around and the only problem I
encountered was that on a busybox/ARM some Makefiles are relying on gnu
touch (using options -r and -t) which was not available under the name
"touch" but gtouch (installed separately from busybox). This could have
been simplier with a $(TOUCH) make variable. Idealy, configure should
have tried to find a suitable touch program but I don't think there is
already a macro for that.

Anyway, congrats for this release. As a user that's very pleasant that
guile seams to progress so fast these days.