Fixes the following dpkg-shlibdeps warning: dependency on libXtst.so.6
could be avoided if "debian/keynav/usr/bin/keynav" were not uselessly
linked against it (they use none of its symbols).

Index: keynav/Makefile
===================================================================
--- keynav.orig/Makefile	2011-08-05 20:56:10.000000000 +0200
+++ keynav/Makefile	2011-08-05 20:56:38.000000000 +0200
@@ -1,5 +1,5 @@
-CFLAGS+=$(shell pkg-config --cflags cairo-xlib xinerama glib-2.0 xext x11 xtst 2> /dev/null || echo -I/usr/X11R6/include -I/usr/local/include)
-LDFLAGS+=$(shell pkg-config --libs cairo-xlib xinerama glib-2.0 xext x11 xtst 2> /dev/null || echo -L/usr/X11R6/lib -L/usr/local/lib -lX11 -lXtst -lXinerama -lXext -lglib)
+CFLAGS+=$(shell pkg-config --cflags cairo-xlib xinerama glib-2.0 xext x11 2> /dev/null || echo -I/usr/X11R6/include -I/usr/local/include)
+LDFLAGS+=$(shell pkg-config --libs cairo-xlib xinerama glib-2.0 xext x11 2> /dev/null || echo -L/usr/X11R6/lib -L/usr/local/lib -lX11 -lXinerama -lXext -lglib)
 LDFLAGS+=$(shell pkg-config --libs glib-2.0)
 
 OTHERFILES=README CHANGELIST COPYRIGHT \