Add "slow_start" keyword to init

This keyword will cause init to wait a few seconds before exec'ing
the target binary.  Maybe only useful for hacks and debugging.

Change-Id: I85caa0bcbc0be7e48bd21eb9e31e039c0740c8d5
diff --git a/init/keywords.h b/init/keywords.h
index 25315d8..8710523 100644
--- a/init/keywords.h
+++ b/init/keywords.h
@@ -62,6 +62,7 @@
     KEYWORD(setkey,      COMMAND, 0, do_setkey)
     KEYWORD(setprop,     COMMAND, 2, do_setprop)
     KEYWORD(setrlimit,   COMMAND, 3, do_setrlimit)
+    KEYWORD(slow_start,  OPTION,  0, 0)
     KEYWORD(socket,      OPTION,  0, 0)
     KEYWORD(start,       COMMAND, 1, do_start)
     KEYWORD(stop,        COMMAND, 1, do_stop)