fix memcpy-param-overlap

src/parse.y

@@ -5466,7 +5466,7 @@ mrb_parser_set_filename(struct mrb_parser_state *p, const char *f)
 
   new_table = (mrb_sym*)parser_palloc(p, sizeof(mrb_sym) * p->filename_table_length);
   if (p->filename_table) {
-    memcpy(new_table, p->filename_table, sizeof(mrb_sym) * p->filename_table_length);
+    memmove(new_table, p->filename_table, sizeof(mrb_sym) * p->filename_table_length);
   }
   p->filename_table = new_table;
   p->filename_table[p->filename_table_length - 1] = sym;