Fix MK-EXT package name.
Fixed location of the LISP-INVOCATION library.

This is now included in the ext/ directory of the git repo.
Update some ext/ ernal-dependencies that were in a bad state.
Implement make ext as git submodule update --init
Added missing argument to MKCL-specific block.
Merge branch 'master' of ssh://common-lisp.net/project/asdf/public_html/asdf
Replace non-ASCII error message with ASCII version.

Fixes pseudo-test failure on SBCL.
Remove UTF-8 accented character from debug.lisp so it can be loaded with strict ASCII encoding.