Fix dbus-c++ to compile examples in a cross compilation environment

examples/properties/Makefile.am

Index: examples/properties/Makefile.am
diff --git a/examples/properties/Makefile.am b/examples/properties/Makefile.am
index a99749a19f191c29b6d6b350e32449b871b5135b..45fca8235f6501d0a426569803f8a0f033599c0c 100644
--- a/examples/properties/Makefile.am
+++ b/examples/properties/Makefile.am
@@ -1,5 +1,11 @@
 EXTRA_DIST = propsgs-introspect.xml
 
+if CROSS_COMPILING
+dbusxx_xml2cpp = dbusxx-xml2cpp
+else
+dbusxx_xml2cpp = $(top_builddir)/tools/dbusxx-xml2cpp
+endif
+
 AM_CPPFLAGS = -I$(top_srcdir)/include -I$(top_builddir)/include
 
 noinst_PROGRAMS = propsgs-server propsgs-client
@@ -11,10 +17,10 @@ propsgs_client_SOURCES = propsgs-glue-proxy.h propsgs-client.h propsgs-client.cp
 propsgs_client_LDADD = $(top_builddir)/src/libdbus-c++-1.la -lpthread
 
 propsgs-glue-adaptor.h: propsgs-introspect.xml
-	$(top_builddir)/tools/dbusxx-xml2cpp $^ --adaptor=$@ --
+	$(dbusxx_xml2cpp) $^ --adaptor=$@ --
 
 propsgs-glue-proxy.h: propsgs-introspect.xml
-	$(top_builddir)/tools/dbusxx-xml2cpp $^ --proxy=$@ --
+	$(dbusxx_xml2cpp) $^ --proxy=$@ --
 
 BUILT_SOURCES = propsgs-glue-adaptor.h propsgs-glue-proxy.h
 CLEANFILES = $(BUILT_SOURCES)