Add Random instances for more base types

[basvandijk]

Proposal:

Add Random instances for:

• all the types in Data.Int: (Int is already provided) Int8, Int16, Int32, Int64

• all the types in Data.Word: Word, Word8, Word16, Word32, Word64

• almost all the types in Foreign.C.Types: CChar, CSChar, CUChar, CShort, CUShort, CInt, CUInt, CLong, CULong, CPtrdiff, CSize, CWchar CSigAtomic, CLLong, CULLong, CIntPtr, CUIntPtr, CIntMax, CUIntMax, CFloat, CDouble

Does it make sense to have Random instances for CClock and CTime?

[basvandijk]

 Thread on the libraries list.

[igloo]

Bas said on the list:

The deadline for this proposal has passed. There were no objections.

(please try to remember to add the summary to the ticket).

Applied, thanks.