* coffread.c: Re-work a lot of the coff-specific stuff to use stuff

in buildsym.c.  This includes coff_finish_block, coff_context_stack,
	coff_local_symbols, coff_file_symbols, coff_global_symbols,
	coff_end_symtab and coff_add_symbol_to_list.
	(read_enum_type): Deal with it now that we have a "struct pending"
	not a "struct coff_pending".

gdb/coffread.c

@@ -347,8 +347,10 @@ static void
 coff_start_symtab ()
 {
   start_symtab (
-		/* We fill in the filename later.  */
-		"",
+		/* We fill in the filename later.  But start_symtab
+		   expects something we can later free() (in end_symtab).
+		   FIXME: leaks memory.  */
+		savestring ("", 0),
 		/* We never know the directory name for COFF.  */
 		NULL,
 		/* The start address is irrelevant, since we set