stats: rename StatEvent() function to schedStatEvent().

This follows the style rules and is more descriptive.

src/python/m5/stats.py

@@ -28,7 +28,7 @@
 
 import internal
 
-from internal.stats import StatEvent as event
+from internal.stats import schedStatEvent as schedEvent
 from objects import Root
 
 def initText(filename, desc=True):

src/python/swig/stats.i

@@ -50,7 +50,8 @@ void initMySQL(std::string host, std::string database, std::string user,
     std::string passwd, std::string project, std::string name,
     std::string sample);
 
-void StatEvent(bool dump, bool reset, Tick when = curTick, Tick repeat = 0);
+void schedStatEvent(bool dump, bool reset,
+                    Tick when = curTick, Tick repeat = 0);
 
 void enable();
 void prepare();