Include convert extension in packages setup

(reported by Christian Ebert and Eric Hopper)

setup.py

@@ -61,7 +61,7 b" setup(name='mercurial',"
       url='http://selenic.com/mercurial',
       description='Scalable distributed SCM',
       license='GNU GPL',
-      packages=['mercurial', 'mercurial.hgweb', 'hgext'],
+      packages=['mercurial', 'mercurial.hgweb', 'hgext', 'hgext.convert'],
       ext_modules=[Extension('mercurial.mpatch', ['mercurial/mpatch.c']),
                    Extension('mercurial.bdiff', ['mercurial/bdiff.c']),
                    Extension('mercurial.base85', ['mercurial/base85.c'])],