$NetBSD$

Make stupid check for bison and flex a bit less stupid.

--- configure.orig	2023-02-13 21:30:40.779472369 +0000
+++ configure
@@ -11880,11 +11880,11 @@ test -n "$YACC" || YACC="yacc"
 
 
 
-if test "x$LEX" != xflex; then
+if test "x$(basename "$LEX")" != xflex; then
   as_fn_error $? "could not find required installation of FLEX" "$LINENO" 5
 fi
 
-if test "x$YACC" != x"bison -y"; then
+if test "x$(basename "$YACC")" != x"bison -y"; then
   as_fn_error $? "could not find required installation of BISON" "$LINENO" 5
 fi
 
