Do not build qt6 subpackages on s390x for now

See the spec file comment for more info.

Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com>

quazip.spec

@@ -9,8 +9,15 @@
 # Fedora - build everything
 %bcond_without	qt4
 %bcond_without	qt5
+# qt6 is currently FTBFS and thus excluded on s390x
+# https://bugzilla.redhat.com/show_bug.cgi?id=2012824
+# https://bugreports.qt.io/browse/QTBUG-93101
+%ifarch s390x
+%bcond_with	qt6
+%else
 %bcond_without	qt6
 %endif
+%endif
 
 %bcond_without test