Support "--debug" for the clang compiler as well.
Support "--debug" for the clang compiler as well.

Turns out, it has nothing to say about the generated code. Which is
good news. Now the basic tests can be run with "--clang --debug" and
all pass with version 3.0 of clang under Debian.

wfxiang08/Nuitka,kayhayen/Nuitka,tempbottle/Nuitka,kayhayen/Nuitka,tempbottle/Nuitka,tempbottle/Nuitka,tempbottle/Nuitka,wfxiang08/Nuitka,kayhayen/Nuitka,wfxiang08/Nuitka,wfxiang08/Nuitka,kayhayen/Nuitka