Typos of sorts in l3bootstrap


git-svn-id: http://www.latex-project.org/svnroot/experimental/trunk@4629 de43f980-851b-0410-b2f7-c40aca1f87e0
A missed "expl" => "kernel" change

The name changing code is 'kernel' (always needed) rather than 'expl'
(tied to the LaTeX2e package).


git-svn-id: http://www.latex-project.org/svnroot/experimental/trunk@4630 de43f980-851b-0410-b2f7-c40aca1f87e0