don't use out of date macro.

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@4546 d0543943-73ff-0310-b7d9-9358b9ac24b2

libs/sqlite/configure.ac

@@ -394,7 +394,10 @@ else
   AC_MSG_RESULT(unknown)
 fi
 if test "$CYGWIN" != "yes"; then
-  AC_CYGWIN
+  case $host_os in
+    *cygwin* ) CYGWIN=yes;;
+    * ) CYGWIN=no;;
+  esac
 fi
 if test "$CYGWIN" = "yes"; then
   BUILD_EXEEXT=.exe