Haddock's resource directory isn't properly handled by Hadrian

I'm still investigating, but several things look off about how Hadrian handles Haddock's resources (which are in utils/haddock/haddock-api/resource).

• only the html folder is being copied, which means that there is no way haddock --latex will work
• the resources (both html and latex) should probably be specified as runtimeDependencies of the Haddock builder instead of woven into the doc rules
• the Haddock wrapper in the BinaryDist rules specifies the wrong --lib dir (we currently put Haddock's resources in the doc folder, not the lib folder as we do for the Make system)

Trac metadata

Trac field	Value
Version	8.6.3
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Build System (Hadrian)
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