Use semicolon after wxIMPLEMENT_*_CLASS* in wx's own implementations

wxIMPLEMENT_DYNAMIC/ABSTRACT_CLASS* is documented to be used with a
semicolon, though it is not mandatory.

Not touching headers yet, to avoid -pedantic warnings in user code.

See https://github.com/wxWidgets/wxWidgets/pull/2584

src/common/module.cpp

@@ -22,7 +22,7 @@
 
 #define TRACE_MODULE wxT("module")
 
-wxIMPLEMENT_ABSTRACT_CLASS(wxModule, wxObject)
+wxIMPLEMENT_ABSTRACT_CLASS(wxModule, wxObject);
 
 wxModuleList wxModule::ms_modules;
 bool wxModule::ms_areInitialized = false;