swig-rb test failures, looking for pristines

["Hyrum K. Wright" <hy...@mail.utexas.edu>]

I'm trying to track down the swig ruby bindings failures which are
still happening on trunk.  The errors for both tests are similar:

subversion/libsvn_wc/wc_db.c:2252: Svn::Error::WcDbError: Pristine
text not found
/home/hwright/dev/svn-buildslave/svn-x64-ubuntu/build/subversion/bindings/swig/ruby/svn/util.rb:99:in
`svn_client_commit4'
/home/hwright/dev/svn-buildslave/svn-x64-ubuntu/build/subversion/bindings/swig/ruby/svn/util.rb:99:in
`commit4'
/home/hwright/dev/svn-buildslave/svn-x64-ubuntu/build/subversion/bindings/swig/ruby/svn/client.rb:185:in
`commit'
/home/hwright/dev/svn-buildslave/svn-x64-ubuntu/build/subversion/bindings/swig/ruby/test/test_delta.rb:332:in
`test_changed'
/home/hwright/dev/svn-buildslave/svn-x64-ubuntu/build/subversion/bindings/swig/ruby/test/util.rb:202:in
`make_context'
/home/hwright/dev/svn-buildslave/svn-x64-ubuntu/build/subversion/bindings/swig/ruby/test/test_delta.rb:291:in
`test_changed'

I think then, that these errors are due to the new pristine store,
though I've not dug deep to find out.  If anybody has quick intuition
on what might be failing, I'm interested to know what it is.

-Hyrum