Three Hexagon bugs found by Gemini Pro. (#8989) #1167

Job	Run time
Build Halide wheels for macosx_arm64	32m 5s
Build Halide wheels for win_amd64	1h 44m 31s
Build Halide wheels for manylinux_x86_64	52m 26s
Build Halide wheels for macosx_x86_64	1h 3m 34s
Publish on PyPI	1m 12s
	4h 13m 48s

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