Logic fix for token approval
remove debug
Version string hack
Fix the fix for token guessing
Hack to make INF values at least be valid JSON
Check for Decl validity and skip if invalid
Add "Null" driver for no output.  Allow unknown tokens to pass as
tok_ok without upgrading them.  This should still fail if nothing but
tok_ok is encountered, but otherwise allow things like types etc that
are identifiers but not #defines.
Don't make Null the default output driver :P
Make all headers NOINST
Fix for typedefs with __attribute__ ((__mode__ ...))
Actually require clang 3.4
Merge branch 'llvm-3.4' into cxx