Use glibc-headers-x86 instead of gblic-headers%{?_isa}
    
    Architecture specific glibc-headers are no longer availbale instead
    require newly crafted noarch packages for librichacl-devel
    
    https://fedoraproject.org/wiki/Changes/RemoveGlibcHeaders
    
    Signed-off-by: Anoop C S <anoopcs@redhat.com>