mmtk: fix linking issue with shape.h #10560

Job	Run time
Windows 2022/Visual C++ 2019 (check)	24m 49s
Windows 2025/Visual C++ 2019 (check)	22m 27s
Windows 11-arm/Visual C++ (btest test-basic test-tool)	16m 3s
Windows 2022/Visual C++ 2019 (test-bundled-gems)	21m 18s
Windows result	1s
	1h 24m 38s

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