110065 fix build with gcc-5.x (rhbz#1239418)

Authored and Committed by Dominik Mierzejewski 4 years ago
    fix build with gcc-5.x (rhbz#1239418)
    
    - fix bogus date in changelog and clean up spec
    - drop dual release versioning
    - comply with Emacs packaging guidelines
    - add missing BR: words for megatest
    
        
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