VisibilityInlinesHidden: restrict test to gcc >= 4.2
Merge topic 'fix-visibility-inlines-hidden' into next

700e28e0 VisibilityInlinesHidden: restrict test to gcc >= 4.2
VisibilityInlinesHidden: only apply -fvisibility-inlines-hidden to C++ sources
Merge topic 'fix-visibility-inlines-hidden' into next

efdcebdd VisibilityInlinesHidden: only apply -fvisibility-inlines-hidden to C++ sources