New codegen failing test-cases

[Edward Z. Yang]

Ok, I have a stage2 compiler built with the new codegen all
the way, and here are the new failing cases:

   1372(normal)
   2047(normal)
   4030(normal)
   OldException001(normal)
   async001(normal)
   bug1465(normal)
   cabal01(normal)
   cabal03(normal)
   cgrun016(normal)
   cgrun045(normal)
   copyFile002(normal)
   dsrun005(normal)
   dsrun008(normal)
   exceptionsrun002(normal)
   ffi008(normal)
   getDirContents002(normal)
   hGetLine002(normal)
   hSeek004(normal)
   hTell002(normal)
   hash001(normal)
   ioeGetHandle001(normal)
   openFile002(normal)
   process003(normal)
   readwrite002(normal)
   simplrun010(optc)
   strun002(optc)

Based on the composition of these bugs, my guess is that maybe the foreign
function call part of the generator is still a little mushy.

Cheers,
Edward