Build problem & unrelated patch

[No Itisnt]

Recently I get a build failure on libguile/guile-procedures.texi:

guile: uncaught throw to misc-error: (dynamic-link file: ~S, message:
~S (libguile-srfi-srfi-1-v-4 file not found) #f)

Which would appear to be because srfi/ is not yet built. Anyone get
the same problem? I'm not sure how to go about fixing it.

Here is a patch that uses AM_SILENT_RULES
(http://www.flameeyes.eu/autotools-mythbuster/automake/silent.html) to
pare down build output, and also adds some files to .gitignore. I
think it's a good idea.