next portion of selinux updates: chcon, runcon. From
Yuichi Nakamura <himainu-ynakam@miomio.jp>  
KaiGai Kohei <busybox@kaigai.gr.jp>
diff --git a/libbb/Kbuild b/libbb/Kbuild
index a53b17f..ffded6a 100644
--- a/libbb/Kbuild
+++ b/libbb/Kbuild
@@ -106,6 +106,7 @@
 lib-$(CONFIG_LOGIN) += correct_password.o
 lib-$(CONFIG_DF) += find_mount_point.o
 lib-$(CONFIG_MKFS_MINIX) += find_mount_point.o
+lib-$(CONFIG_SELINUX) += selinux_common.o
 
 # We shouldn't build xregcomp.c if we don't need it - this ensures we don't
 # require regex.h to be in the include dir even if we don't need it thereby