added several system call hooks for future sockets implementation

sysdeps/unix/make-syscalls.sh

Index: sysdeps/unix/make-syscalls.sh
diff --git a/sysdeps/unix/make-syscalls.sh b/sysdeps/unix/make-syscalls.sh
index 674d9533fb460ddc883f2e0fa01f849695bc70cf..f6bfdeca3fbb7fd3a891379a9c788cf87062457f 100644
--- a/sysdeps/unix/make-syscalls.sh
+++ b/sysdeps/unix/make-syscalls.sh
@@ -1,8 +1,6 @@
 #! /bin/sh
-
 # Usage: make-syscalls.sh ../sysdeps/unix/common
 # Expects $sysdirs in environment.
-
 ##############################################################################
 
 # Syscall Signature Key Letters for BP Thunks:
@@ -210,7 +208,7 @@ shared-only-routines += $file
   for arg; do
     echo -n "$sprtr"
     case $arg in
-      [abIpP]*) echo -n "void *$arg";;
+      [abIpPBN]*) echo -n "void *$arg";;
       f*) echo -n "int $arg[2]";;
       i*) echo -n "int $arg";;
       n*) echo -n "size_t $arg";;