9e28c42 Auto-sync with upstream branch master

Authored and Committed by fweimer 6 years ago
    Auto-sync with upstream branch master
    
    Upstream commit: 09085ede12fb9650f286bdcd805609ae69f80618
    
    - nptl: Fix stack guard size accounting (#1527887)
    - Remove invalid Obsoletes: on glibc-header provides
    - Require python3 instead of python during builds
    - math: ldbl-128ibm lrintl/lroundl missing "invalid" exceptions (swbz#22690)
    - x86-64: Add sincosf with vector FMA
    
        
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