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hadrian: Pass cpp options to the CC builder in hadrian

Hannes Siebenhandl requested to merge wip/fendor/hadrian-cc-builder-cpp-options into master

Pass the cxxOptions to the CC builder. Afaict, we forgot to pass cxxOptions to C++ sources, failing to compile in some cases. This is relevant to compile ghc with ghc-debug support, which ships with C++ sources.

Further, we always pass ghcversion.h to C/C++ sources, so they can use the MIN_VERSION_GLASGOW_HASKELL macro. These two changes enable us to build ghc with ghc-debug support without having to change ghc-debug at all.

Further, I think both these changes are generally correct, so can be applied to hadrian directly.

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