Stackless issue python#283: Update Stackless code directories in configure*

The list of Stackless code directories needed an update.

Author: akruis

configure

@@ -16551,7 +16551,7 @@ do
 done
 
 
-SRCDIRS="Parser Objects Python Modules Programs Stackless Stackless/core Stackless/module Stackless/pickling"
+SRCDIRS="Parser Objects Python Modules Programs Stackless/core Stackless/module Stackless/pickling Stackless/platf"
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for build directories" >&5
 $as_echo_n "checking for build directories... " >&6; }
 for dir in $SRCDIRS; do

configure.ac

@@ -5243,7 +5243,7 @@ do
 done
 
 AC_SUBST(SRCDIRS)
-SRCDIRS="Parser Objects Python Modules Programs Stackless Stackless/core Stackless/module Stackless/pickling"
+SRCDIRS="Parser Objects Python Modules Programs Stackless/core Stackless/module Stackless/pickling Stackless/platf"
 AC_MSG_CHECKING(for build directories)
 for dir in $SRCDIRS; do
     if test ! -d $dir; then