8073387: Move VerifyOopClosures out from genOopClosures.hpp
Reviewed-by: brutisso, mgerdin, coleenp
^build/
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^src/share/tools/hsdis/build/
^src/share/tools/IdealGraphVisualizer/[a-zA-Z0-9]*/build/
^src/share/tools/IdealGraphVisualizer/build/
^src/share/tools/IdealGraphVisualizer/dist/
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