Add an ambuild configure option to disable auto versioning.
Only spew JIT compilation and opcodes when built with JIT_SPEW defined.
Merge pull request #71 from VoiDeD/jit-spew

Only spew JIT compilation and opcodes when built with JIT_SPEW defined.
Merge pull request #61 from VoiDeD/ambuild-disable-auto-versioning

Add an ambuild configure option to disable auto versioning.