setup: add overlooked hgext.infinitepush package declaration

Will fix infinitepush tests that have been failing when run without --local.

Differential Revision: https://phab.mercurial-scm.org/D3038

setup.py

@@ -816,7 +816,9 b" packages = ['mercurial',"
             'mercurial.thirdparty.zope.interface',
             'mercurial.utils',
             'hgext', 'hgext.convert', 'hgext.fsmonitor',
-            'hgext.fsmonitor.pywatchman', 'hgext.highlight',
+            'hgext.fsmonitor.pywatchman',
+            'hgext.infinitepush',
+            'hgext.highlight',
             'hgext.largefiles', 'hgext.lfs', 'hgext.narrow',
             'hgext.zeroconf', 'hgext3rd',
             'hgdemandimport']