JIT

GH-126920: fix Makefile overwriting sysconfig.get_config_vars #42

Job	Run time
Interpreter (Debug)	6m 59s
Free-Threaded (Debug) (19)	10m 27s
i686-pc-windows-msvc/msvc (Debug)	18m 3s
i686-pc-windows-msvc/msvc (Release)	21m 58s
x86_64-pc-windows-msvc/msvc (Debug)	17m 45s
x86_64-pc-windows-msvc/msvc (Release)	21m 45s
aarch64-pc-windows-msvc/msvc (Debug)	4m 53s
aarch64-pc-windows-msvc/msvc (Release)	6m 12s
x86_64-apple-darwin/clang (Debug)	10m 58s
x86_64-apple-darwin/clang (Release)	17m 3s
aarch64-apple-darwin/clang (Debug)	10m 0s
aarch64-apple-darwin/clang (Release)	14m 19s
x86_64-unknown-linux-gnu/gcc (Debug)	7m 34s
x86_64-unknown-linux-gnu/gcc (Release)	17m 54s
x86_64-unknown-linux-gnu/clang (Debug)	7m 23s
x86_64-unknown-linux-gnu/clang (Release)	13m 34s
aarch64-unknown-linux-gnu/gcc (Debug)	1h 13m 1s
aarch64-unknown-linux-gnu/gcc (Release)	37m 24s
aarch64-unknown-linux-gnu/clang (Debug)	1h 8m 16s
aarch64-unknown-linux-gnu/clang (Release)	38m 48s
	7h 4m 16s

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