kbuild: Add dependency info to modules

During postprocessing, we get the information which modules we depend on 
(i.e. which modules export symbols we need to import) for free, so we
record it in .modinfo. This may allow us to remove the "depmod" program
at a later time, though for now it remains working as usual.

kernel/module.c

@@ -1455,9 +1455,9 @@ static const char *get_ksymbol(struct module *mod,
 
 	/* At worse, next value is at end of module */
 	if (within(addr, mod->module_init, mod->init_size))
-		nextval = (unsigned long)mod->module_core+mod->core_size;
+		nextval = (unsigned long)mod->module_init + mod->init_size;
 	else 
-		nextval = (unsigned long)mod->module_init+mod->init_size;
+		nextval = (unsigned long)mod->module_core + mod->core_size;
 
 	/* Scan for closest preceeding symbol, and next symbol. (ELF
            starts real symbols at 1). */