[spectest] Fix a bug in the spectest, and fudge one test that Rakudo can't pass yet, for subset types in multiple dispatch.
[spectest] Fix a bug in the spectest, and fudge one test that Rakudo can't pass yet, for subset types in multiple dispatch.

git-svn-id: 53605643c415f7495558be95614cf14171f1db78@22979 c213334d-75ef-0310-aa23-eaa082d1ae64

niner/roast,niner/roast,skids/roast,niner/roast,dankogai/roast,bitrauser/roast,bitrauser/roast,perl6/roast,cygx/roast,dogbert17/roast,zostay/roast,skids/roast,zostay/roast,dankogai/roast,dogbert17/roast,laben/roast,b2gills/roast,laben/roast,laben/roast,b2gills/roast,zostay/roast,skids/roast,b2gills/roast,dankogai/roast,cygx/roast,cygx/roast