Promote su from pending to lsb.
diff --git a/toys/pending/su.c b/toys/lsb/su.c
similarity index 99%
rename from toys/pending/su.c
rename to toys/lsb/su.c
index eac149c..52d2024 100644
--- a/toys/pending/su.c
+++ b/toys/lsb/su.c
@@ -9,7 +9,7 @@
 
 config SU
   bool "su"
-  default n
+  default y
   help
     usage: su [-lmp] [-c CMD] [-s SHELL] [USER [ARGS...]]