scripts/tracetool: Replace the word 'whitelist'

Follow the inclusive terminology from the "Conscious Language in your
Open Source Projects" guidelines [*] and replace the words "whitelist"
appropriately.

[*] https://github.com/conscious-lang/conscious-lang-docs/blob/main/faq.md

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20210303184644.1639691-3-philmd@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>

scripts/tracetool/__init__.py

@@ -100,7 +100,7 @@ def validate_type(name):
         if bit == "const":
             continue
         if bit not in ALLOWED_TYPES:
-            raise ValueError("Argument type '%s' is not in whitelist. "
+            raise ValueError("Argument type '%s' is not allowed. "
                              "Only standard C types and fixed size integer "
                              "types should be used. struct, union, and "
                              "other complex pointer types should be "