blitz++: mark as broken

Changed files
+2
pkgs
development
libraries
blitz
+2
pkgs/development/libraries/blitz/default.nix
···
random number generators, and small vectors (useful for representing
multicomponent or vector fields).
'';
+
+
broken = true; # failing test, ancient version, no library user in nixpkgs => if you care to fix it, go ahead
};
}