Add a switch_root utility (like kconfig's utils/run_init.c, although not
actuall using any of that code). This is needed because pivot_root doesn't
work right under initramfs. (See the menuconfig help.)
diff --git a/include/applets.h b/include/applets.h
index a814ce1..883e559 100644
--- a/include/applets.h
+++ b/include/applets.h
@@ -625,6 +625,9 @@
#ifdef CONFIG_SWAPONOFF
APPLET(swapon, swap_on_off_main, _BB_DIR_SBIN, _BB_SUID_NEVER)
#endif
+#ifdef CONFIG_SWITCH_ROOT
+ APPLET(switch_root, switch_root_main, _BB_DIR_SBIN, _BB_SUID_NEVER)
+#endif
#ifdef CONFIG_SYNC
APPLET(sync, sync_main, _BB_DIR_BIN, _BB_SUID_NEVER)
#endif