Work around LLVM header peculiarity

Bug report: http://llvm.org/bugs/show_bug.cgi?id=21472
JIT: remove accidentally left-in debug code
Merge pull request #1505 from FioraAeterna/fixbadmistake

JIT: remove accidentally left-in debug code
Merge pull request #1488 from Tilka/llvm_stdint_defines

Work around LLVM header peculiarity