Switch to toybox kill.

Change-Id: If4f6b3ba13a324fc303fc738006710c6eddb293c
diff --git a/Android.mk b/Android.mk
index 64367e4..c137097 100644
--- a/Android.mk
+++ b/Android.mk
@@ -182,7 +182,7 @@
 
 LOCAL_MODULE := toybox
 
-# dupes: cat chmod chown cmp cp date df du grep id ifconfig kill ls mkdir
+# dupes: cat chmod chown cmp cp date df du grep id ifconfig ls mkdir
 #        mknod mount mv nc netcat notify(inotifyd) renice rm rmdir
 #        touch umount
 # obsolete?: cpio killall5 link unlink
@@ -221,6 +221,7 @@
     head \
     hostname \
     insmod \
+    kill \
     killall \
     ln \
     logname \