Fix dist tag

The dist tag should be of the form "%{?dist}", but instead found this:
%{dist}

regexp.spec

@@ -1,6 +1,6 @@
 Name:           regexp
 Version:        1.5
-Release:        15%{dist}
+Release:        16%{?dist}
 Summary:        Simple regular expressions API
 License:        ASL 2.0
 URL:            http://jakarta.apache.org/%{name}/
@@ -63,6 +63,9 @@ dummy = posix.readlink(dir) and os.remove(dir)
 %{_javadocdir}/%{name}
 
 %changelog
+* Mon Jun  2 2014 Mikolaj Izdebski <mizdebsk@redhat.com> - 1.5-16
+- Fix dist tag
+
 * Mon May 12 2014 Mikolaj Izdebski <mizdebsk@redhat.com> - 1.5-15
 - Update to current packaging guidelines
 - Resolves: rhbz#976723