5eabb79 Auto-sync with upstream branch release/2.28/master

Authored and Committed by fweimer 4 years ago
    Auto-sync with upstream branch release/2.28/master
    
    Upstream commit: 57922433fa038faa6e37798b9655f85a94978d89
    
    - aarch64: handle STO_AARCH64_VARIANT_PCS
    - aarch64: add STO_AARCH64_VARIANT_PCS and DT_AARCH64_VARIANT_PCS
    - io: Remove copy_file_range emulation (#1724976)
    
        
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