core/busybox: support for depmod -r

so we can build linux kernel

core/busybox/APKBUILD

@@ -1,6 +1,7 @@
+# Maintainer: Natanael Copa <ncopa@alpinelinux.org>
 pkgname=busybox
 pkgver=1.13.2
-pkgrel=4
+pkgrel=5
 pkgdesc="Size optimized toolbox of many common UNIX utilities"
 url=http://busybox.net
 license=GPL-2
@@ -15,6 +16,7 @@ source="http://busybox.net/downloads/$pkgname-$pkgver.tar.bz2
 	busybox-1.13.2-modprobe-errormsg.patch
 	busybox-1.13.2-modprobe-speedup.patch
 	busybox-1.13.2-tar.patch
+	busybox-1.13.2-depmod2.patch
 	busyboxconfig"
 
 build() {
@@ -45,4 +47,5 @@ a72d169e9545e26257032e0e367feb95  busybox-1.13.2-mdev.patch
 a743ec04f378b8456a725c7270b0be8b  busybox-1.13.2-modprobe-errormsg.patch
 2120bc7d9fb4dcbbb94664c9fefa4c8a  busybox-1.13.2-modprobe-speedup.patch
 90d093817855bc63ad16fbb8524f80df  busybox-1.13.2-tar.patch
+3c43008545e069749d2d653532e1feb3  busybox-1.13.2-depmod2.patch
 7da47c98607834ca9c47a22bf3fe4b6e  busyboxconfig"

core/busybox/busybox-1.13.2-depmod2.patch

@@ -0,0 +1,21 @@
+--- busybox-1.13.2/modutils/depmod.c.orig	2009-02-25 11:54:02.000000000 +0000
++++ busybox-1.13.2/modutils/depmod.c	2009-02-25 11:57:33.000000000 +0000
+@@ -36,7 +36,8 @@
+ 	ARG_b = (1<<2), /* base directory when modules are in staging area */
+ 	ARG_e = (1<<3), /* with -F, print unresolved symbols */
+ 	ARG_F = (1<<4), /* System.map that contains the symbols */
+-	ARG_n = (1<<5)  /* dry-run, print to stdout only */
++	ARG_n = (1<<5), /* dry-run, print to stdout only */
++	ARG_r = (1<<6)  /* Compat dummy. Linux Makefile uses it */
+ };
+ 
+ static int FAST_FUNC parse_module(const char *fname, struct stat *sb,
+@@ -138,7 +139,7 @@
+ 	struct utsname uts;
+ 	int tmp;
+ 
+-	getopt32(argv, "aAb:eF:n", &moddir_base, NULL);
++	getopt32(argv, "aAb:eF:nr", &moddir_base, NULL);
+ 	argv += optind;
+ 
+ 	/* goto modules location */