Architecture specific change in rpms/icecat.git

The package rpms/icecat.git has added or updated architecture specific content in its
spec file (ExclusiveArch/ExcludeArch or %ifarch/%ifnarch) in commit(s):
http://pkgs.fedoraproject.org/cgit/rpms/icecat.git/commit/?id=104e96886ca1d1...
http://pkgs.fedoraproject.org/cgit/rpms/icecat.git/commit/?id=538aff29f23365...
http://pkgs.fedoraproject.org/cgit/rpms/icecat.git/commit/?id=5f3c8bb8db4fa5....

Change:
+%ifarch %{arm}
+%ifnarch s390 s390x
+%ifnarch %{arm}

Thanks.