pythonPackages.asyncssh: 1.15.1 -> 1.16.1

https://github.com/ronf/asyncssh/blob/master/docs/changes.rst#release-1161-30-mar-2019

pkgs/development/python-modules/asyncssh/fix-sftp-chmod-test-nixos.patch

@@ -0,0 +1,15 @@
+diff --git a/tests/test_sftp.py b/tests/test_sftp.py
+index db9cc88..234004b 100644
+--- a/tests/test_sftp.py
++++ b/tests/test_sftp.py
+@@ -957,8 +957,8 @@ class _TestSFTP(_CheckSFTP):
+ 
+         try:
+             self._create_file('file')
+-            yield from sftp.chmod('file', 0o4321)
+-            self.assertEqual(stat.S_IMODE(os.stat('file').st_mode), 0o4321)
++            yield from sftp.chmod('file', 0o1234)
++            self.assertEqual(stat.S_IMODE(os.stat('file').st_mode), 0o1234)
+         finally:
+             remove('file')
+