include: don't install propertyst.h

Nothing in here needs anything from that include file, so no need for
including it.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>

hw/xfree86/sdksyms.sh

@@ -251,7 +251,6 @@ cat > sdksyms.c << EOF
 #include "pixmapstr.h"
 #include "privates.h"
 #include "property.h"
-#include "propertyst.h"
 #include "ptrveloc.h"
 #include "region.h"
 #include "regionstr.h"

include/meson.build

@@ -484,7 +484,6 @@ if build_xorg
             'pixmapstr.h',
             'privates.h',
             'property.h',
-            'propertyst.h',
             'ptrveloc.h',
             'region.h',
             'regionstr.h',