(make-qualified): Bugfix. When processing gcc.link.dll rule, take 'gcc' as
module name, not 'gcc.link'. The previous behaviour caused 'gcc.link.dll'
to be called in context of 'gcc.link' module. As the result the global
definition of 'gcc.link.dll' was called. That definition is created by jam
when it sees 'actions gcc.link.dll' and has no executable code associated
with it. So, rule 'gcc.link.dll' was never executed.
[SVN r20009]