[releng] Rename py3cairo -> pycairo

[Michael Catanzaro <mcatanzaro src gnome org>]

commit fefc5f5bed7c6d10d8a0719069467c299f18c795
Author: Michael Catanzaro <mcatanzaro igalia com>
Date:   Sun Mar 25 13:52:53 2018 -0500

    Rename py3cairo -> pycairo

 tools/smoketesting/tarball-conversion.config |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/tools/smoketesting/tarball-conversion.config b/tools/smoketesting/tarball-conversion.config
index d2b4221..1ebe0b6 100644
--- a/tools/smoketesting/tarball-conversion.config
+++ b/tools/smoketesting/tarball-conversion.config
@@ -92,7 +92,7 @@
     <package name="mobile-broadband-provider-info"/>
     <package name="osinfo-db-tools"/>
     <package name="pulseaudio"/>
-    <package name="py3cairo"/>
+    <package name="pycairo"/>
     <package name="spice-gtk"/>
     <package name="telepathy-farstream"/>
     <package name="telepathy-glib" limit="0.25"/>