validate should continue if it sees warnings or haddock failures

From this thread: http://www.haskell.org/pipermail/cvs-ghc/2008-August/044517.html

Rather than falling over on warnings and haddock failures, validate should just report them at the end, e.g.:

Unexpected warnings in modules:
        simplCore/Simplify.lhs
        codeGen/CgMonad.lhs

Unexpected Haddock failure in:
        codeGen/CgExpr.lhs

Unexpected testsuite failures in:
        tc125

Trac metadata

Trac field	Value
Version	6.8.3
Type	FeatureRequest
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Build System
Test case
Differential revisions
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Operating system	Unknown
Architecture	Unknown