Reviewed-by: herrick, billyh

Reviewed-by: mbykov

Reviewed-by: jcoomes

Reviewed-by: kamg

Reviewed-by: mduigou, herrick, ohair, ngthomas

Summary: Shark is a JIT compiler for Zero that uses the LLVM compiler infrastructure.
Reviewed-by: ohair

Reviewed-by: prr

6959596: Windows fastdebug build broken
6960335: Add top level 'make test' rule that uses test/Makefile, runs all test batches
Reviewed-by: alanb