fix buid bustage

lib/layout/layform.c

@@ -5494,7 +5494,7 @@ SI_Prompt (MWContext *context, char *prompt,
 }
 
 #include "mkgeturl.h"
-#include "/mozilla/lib/htmldlgs/htmldlgs.h" /* why is full pathname needed? */
+#include "htmldlgs.h"
 extern int XP_EMPTY_STRINGS;
 extern int SA_VIEW_BUTTON_LABEL;
 extern int SA_REMOVE_BUTTON_LABEL;