add busybox and dropbeat initrd patch and add eit remove for old kernels

sys-kernel/recoveryinitramfs/files/busybox/1.20.2/001_all_1.18.1-openvt.diff

@@ -0,0 +1,19 @@
+Based on:
+
+> Allow a slightly wider range of valid vt numbers. Forward-ported from Gentoo
+> Busybox 1.1.3.
+
+> The previous spin of this patch on 1.1.3 had a 'wait(NULL);' right before
+> return EXIT_SUCCESS. I don't think it's needed anymore, so I left it out.
+
+--- a/console-tools/openvt.c	2010-11-22 22:24:58.000000000 +0200
++++ b/console-tools/openvt.c	2010-11-29 15:32:18.000000000 +0200
+@@ -124,7 +124,7 @@ int openvt_main(int argc UNUSED_PARAM, c
+ 
+ 	if (flags & OPT_c) {
+ 		/* Check for illegal vt number: < 1 or > 63 */
+-		vtno = xatou_range(str_c, 1, 63);
++		vtno = xatou_range(str_c, 0, 63);
+ 	} else {
+ 		vtno = find_free_vtno();
+ 	}