Make type constructors strict

[robdockins]

I don't recall the context for this action item, but probably it has to do with squashing space leaks.

[brianhuffman]

The various type constructors are interpreted as strict in the saw-core simulator backends, and have been for some time. We can see this in the definition of the TValue type, where the arguments for vectors, arrays, pairs, and records are themselves fully-evaluated TValues rather than thunks.

saw-script/saw-core/src/Verifier/SAW/Simulator/Value.hs

Lines 72 to 83 in 2e4fc06

	data TValue l
	= VVecType !Natural !(TValue l)
	| VBoolType
	| VIntType
	| VIntModType !Natural
	| VArrayType !(TValue l) !(TValue l)
	| VPiType !(TValue l) !(Thunk l -> EvalM l (TValue l))
	| VUnitType
	| VPairType !(TValue l) !(TValue l)
	| VDataType !Ident ![Value l]
	| VRecordType ![(FieldName, TValue l)]
	| VSort !Sort