Add realpath to busybox.
@ -257,7 +257,7 @@ CONFIG_MV=y
CONFIG_PWD=y
CONFIG_READLINK=y
# CONFIG_FEATURE_READLINK_FOLLOW is not set
# CONFIG_REALPATH is not set
CONFIG_REALPATH=y
CONFIG_RM=y
CONFIG_RMDIR=y
CONFIG_FEATURE_RMDIR_LONG_OPTIONS=y