Update mono-core to rev 127 via SR 809780
    
    https://build.opensuse.org/request/show/809780
    by user namtrac + maxlin_factory
    - Fixup mono-find-requires for v1 profiles
    
    - Add mono-find-provides and mono-find-requires from Fedora and use
      it instead. Fixes boo#1152775
    
    - Add fix-s390x-ucontext.patch: fix the build on 15.2/s390x
      (bsc#1171934).
    - Add _constraints to prevent running out of disk space.
    
    - Enable roslyn on aarch64 to build additionnal tools (mdoc.exe, ...)
    
    - Add mono.attr and install it to %_rpmconfigdir/fileattrs: enable
      the dependency scanner for rpm packages (boo#1152775).
    
    - Update to the most current mono release, 6.8.0.105.