Fixes sleep issue in bash loadable builtins

SIG_DFL simply ignores the interrupt signal 

Signed-off-by: Thiruvadi Rajaraman <trajaraman@mvista.com>

Index: bash-4.2/lib/sh/ufuncs.c
===================================================================
--- bash-4.2.orig/lib/sh/ufuncs.c
+++ bash-4.2/lib/sh/ufuncs.c
@@ -20,6 +20,7 @@
 
 #include "config.h"
 
+#include <signal.h>
 #include "bashtypes.h"
 
 #if defined (TIME_WITH_SYS_TIME)
@@ -89,6 +90,8 @@ fsleep(sec, usec)
 
   tv.tv_sec = sec;
   tv.tv_usec = usec;
+  
+  signal(SIGCHLD,SIG_DFL); /* Ignores the signal */
 
   return select(0, (fd_set *)0, (fd_set *)0, (fd_set *)0, &tv);
 }