the standard functions supported in VCC.

For now put the very magic python script that ties the C code to the
VCL typesystem and the VCC compiler here.  Eventually it goes elsewere.


git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@5145 d4fa192b-c00b-0410-8231-f00ffab90ce4