repoman: remove set literal for python-2.6 compat

diff --git a/bin/repoman b/bin/repoman
index 2f98a9f0b2190ace1ecbc2ae28b63dfefeb3e25a..2f489341bf692acd245be3c210fcebc02b5a4903 100755 (executable)
--- a/bin/repoman
+++ b/bin/repoman
@@ -478,9 +478,9 @@ suspect_virtual = {
        "dev-libs/libusb-compat":"virtual/libusb",
 }
 
-ruby_deprecated = {
+ruby_deprecated = frozenset([
        "ruby_targets_ree18",
-}
+])
 
 metadata_xml_encoding = 'UTF-8'
 metadata_xml_declaration = '<?xml version="1.0" encoding="%s"?>' % \