Fix Sim & checkwps for newer distros

__builtin found fix for rbendian.h
tools/configure defines SIM_USE_BYTESWAP_H if byteswap.h is found in
/usr/include/ maybe there is a better mechanism for this

Change-Id: I4d004e68313e8b32aa5587582be36bc459fdaf6b

firmware/include/rbendian.h

@@ -23,7 +23,7 @@
 
 #include "config.h"
 
-#ifdef SIM_USE_BYTESWAP_H
+#ifdef OS_USE_BYTESWAP_H
 #include <byteswap.h>
 #endif
 

tools/configure

@@ -4394,6 +4394,7 @@ fi
       ;;
     [Cc])
       uname=`uname`
+      checkwps="yes"
       simcc "checkwps"
       toolset='';
       t_cpu='';
@@ -4474,9 +4475,13 @@ fi
 if [ "yes" = "$simulator" ]; then
     echo Unsetting APPLICATION define for SIMULATOR build
     unset application
+fi
+
+# newer glibc implementations use byteswap.h
+if [ "$simulator" = "yes" ] || [ "$checkwps" = "yes" ]; then
     if test -f "$BYTESWP"; then
         echo Using "$BYTESWP"
-        extradefines="$extradefines -DSIM_USE_BYTESWAP_H=$BYTESWP"
+        extradefines="$extradefines -DOS_USE_BYTESWAP_H=$BYTESWP"
     fi
 fi