Add the nounistd option to all lex source files.

libs/wpp/ppl.l

@@ -128,6 +128,7 @@
 %option 8bit never-interactive
 %option nounput
 %option prefix="ppy_"
+%option nounistd
 
 %x pp_pp
 %x pp_eol

programs/winedbg/debug.l

@@ -19,7 +19,7 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  */
 
-%option nounput interactive 8bit prefix="dbg_"
+%option nounput interactive 8bit prefix="dbg_" nounistd
 
 %{
 #include <stdlib.h>

programs/winhelp/macro.lex.l

@@ -20,7 +20,7 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  */
 %}
-%option nounput interactive 8bit
+%option nounput interactive 8bit nounistd
 %x quote
 %{
 #include <assert.h>

tools/widl/parser.l

@@ -21,6 +21,7 @@
 %option stack
 %option nounput noyy_top_state
 %option 8bit never-interactive prefix="parser_"
+%option nounistd
 
 nl	\r?\n
 ws	[ \f\t\r]

tools/wrc/parser.l

@@ -87,6 +87,7 @@
 %option nounput noyy_top_state noyywrap
 %option 8bit never-interactive
 %option prefix="parser_"
+%option nounistd
 
 /* Some shortcut definitions */
 ws	[ \f\t\r]