[PATCH v3 18/26] tests/avocado: set -machine none for userfwd and vnc tests

["Alex Bennée" <alex.bennee@linaro.org>]

These are exercising core QEMU features and don't actually run code.
Not specifying a machine will fail when avocado chooses the native
arch binary to run. Be explicit.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
 tests/avocado/info_usernet.py | 3 +++
 tests/avocado/vnc.py          | 1 +
 2 files changed, 4 insertions(+)

diff --git a/tests/avocado/info_usernet.py b/tests/avocado/info_usernet.py
index b862a47dba..fdc4d90c42 100644
--- a/tests/avocado/info_usernet.py
+++ b/tests/avocado/info_usernet.py
@@ -14,6 +14,9 @@
 
 
 class InfoUsernet(QemuSystemTest):
+    """
+    :avocado: tags=machine:none
+    """
 
     def test_hostfwd(self):
         self.require_netdev('user')
diff --git a/tests/avocado/vnc.py b/tests/avocado/vnc.py
index 187fd3febc..aeeefc70be 100644
--- a/tests/avocado/vnc.py
+++ b/tests/avocado/vnc.py
@@ -53,6 +53,7 @@ def find_free_ports(count: int) -> List[int]:
 class Vnc(QemuSystemTest):
     """
     :avocado: tags=vnc,quick
+    :avocado: tags=machine:none
     """
     def test_no_vnc(self):
         self.vm.add_args('-nodefaults', '-S')
-- 
2.34.1