fix include dir #345

Job	Run time
Rocky Linux	2m 44s
Rocky Linux MinGW	1m 3s
iOS/tvOS SDL3 (iOS, iphoneos, arm64)	45s
FreeBSD	1m 6s
iOS/tvOS SDL3 (iOS, iphonesimulator, x86_64;arm64)	51s
Rocky Linux MinGW SDL3	1m 3s
Debian Linux PPC	1m 44s
iOS/tvOS SDL3 (tvOS, appletvos, arm64)	41s
Debian Linux PPC SDL3	54s
iOS/tvOS SDL3 (tvOS, appletvsimulator, x86_64;arm64)	50s
Rocky Linux SDL3	1m 26s
macOS (x86_64)	25s
macOS (Universal) SDL3	1m 4s
Windows (MSVC)	1m 8s
Windows (MSVC) SDL3	1m 6s
	16m 50s

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