b987e15 update to 2019.05.002 (ABI and API break)

Authored and Committed by rathann 4 years ago
    update to 2019.05.002 (ABI and API break)
    
    add new GPG key
    drop upstreamed papi detection patch
    build VSX kernels on ppc64le (Power8)
    build NEON kernels on aarch64
    
        
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