Handles the removal of embedded zlib from upstream-svn.
Index: navit/configure.in
===================================================================
--- navit.orig/configure.in	2009-12-10 22:18:25.000000000 +0100
+++ navit/configure.in	2009-12-10 22:18:27.000000000 +0100
@@ -848,7 +848,6 @@
 navit/support/libpng/Makefile
 navit/support/win32/Makefile
 navit/support/wordexp/Makefile
-navit/support/zlib/Makefile
 navit/vehicle/Makefile
 navit/vehicle/android/Makefile
 navit/vehicle/file/Makefile