Per Karl's request, we should not clean test data unless we had a "fast" mode of cleaning as an alternative for people who wanted to avoid the delay of cleaning out test data (or for when that data needs to be retained).
Per Karl's request, we should not clean test data unless we had a
"fast" mode of cleaning as an alternative for people who wanted to
avoid the delay of cleaning out test data (or for when that data needs
to be retained).

In this new scheme, the default cleaning rules will remove the test
data. Those "in the know" can use the fast- targets.

* Makefile.in:
  - introduce "fast-clean" and "fast-distclean" targets to perform the
    old "local-" equivalents, without cleaning test data
  - fix "local-clean" and "local-distclean" to perform the fast
    variants, plus cleaning out the test data.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion