ben-raytrace: Add sub dirs to Makefile

Otherwise linking fails.

added 4 commits

• ce0e9a84...9f975a4a - 3 commits from branch master
• 89f885ac - ben-raytrace: Add sub dirs to Makefile

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added 3 commits

• 89f885ac...0d283ccf - 2 commits from branch master
• 5a90def2 - ben-raytrace: Add sub dirs to Makefile

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added 13 commits

• 5a90def2...d8393f58 - 12 commits from branch master
• 165ebd5e - ben-raytrace: Add sub dirs to Makefile

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approved this merge request

merged