Compare against the right xml generator name in test

Author: iMichka

unittests/test_va_list_tag_removal.py

@@ -28,7 +28,7 @@ def __init__(self, *args):
 
     def test_keep_va_list_tag(self):
 
-        if "GCCXML" in self.config.xml_generator:
+        if "gccxml" in self.config.xml_generator:
             return True
 
         self.config.flags = ["f1"]
@@ -59,7 +59,7 @@ def test_keep_va_list_tag(self):
 
     def test_remove_va_list_tag(self):
 
-        if "GCCXML" in self.config.xml_generator:
+        if "gccxml" in self.config.xml_generator:
             return True
 
         self.config.flags = []