JIT

Fixed Tools/jit/_llvm.py #46

Job	Run time
JIT with tail calling interpreter	2m 53s
Interpreter (Debug)	10m 48s
aarch64-apple-darwin/clang (Debug)	12m 59s
JIT without optimizations (Debug)	2m 46s
aarch64-unknown-linux-gnu/gcc (Release)	6m 33s
x86_64-unknown-linux-gnu/gcc (Debug)	10m 33s
aarch64-unknown-linux-gnu/gcc (Debug)	7m 28s
x86_64-apple-darwin/clang (Release)	16m 1s
aarch64-pc-windows-msvc/msvc (Release)	4m 13s
x86_64-unknown-linux-gnu/gcc (Release)	7m 29s
x86_64-apple-darwin/clang (Debug)	18m 59s
i686-pc-windows-msvc/msvc (Debug)	2m 28s
x86_64-pc-windows-msvc/msvc (Debug)	2m 27s
aarch64-pc-windows-msvc/msvc (Debug)	4m 32s
x86_64-pc-windows-msvc/msvc (Release)	2m 39s
aarch64-apple-darwin/clang (Release)	10m 3s
i686-pc-windows-msvc/msvc (Release)	2m 34s
	2h 5m 25s

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