Fix file paths in the header comments.

Consistently use only "wx/foo.h" instead of "include/wx/foo.h" ("include" is
always implicit anyhow).

Also use "src/osx" instead of "src/mac" for the files in this directory.

See #12165.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@64943 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/html/htmlctrl/webkit/webkit.mm

@@ -57,7 +57,7 @@ END_EVENT_TABLE()
 // Carbon Events handlers
 // ----------------------------------------------------------------------------
 
-// prototype for function in src/mac/carbon/toplevel.cpp
+// prototype for function in src/osx/carbon/nonownedwnd.cpp
 void SetupMouseEvent( wxMouseEvent &wxevent , wxMacCarbonEvent &cEvent );
 
 static const EventTypeSpec eventList[] =