Fix #8: Set *default-pathname-defaults* for cmucl.
*default-pathname-defaults* for cmucl in
gclload1.lsp so that
it has the full path to
gclload.lsp. This is needed so that the
tests can be loaded from the subdirectories. Without this, each load
file in the subdirectory is set to #P"" and when it tries to load a
test file, it can't because the setting of
*default-pathname-defaults* isn't pointing to the subdirectory but
rather the main directory since #P"" means current directory, and
cmucl hasn't changed it's current directory.
This fix only applies to cmucl and no other lisps.