build-sys: remove unused GLIB_CFLAGS

Message-Id: <20160925205748.6280-1-marcandre.lureau@redhat.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

configure

@@ -5140,7 +5140,6 @@ fi
 if test "$glib_subprocess" = "yes" ; then
   echo "CONFIG_HAS_GLIB_SUBPROCESS_TESTS=y" >> $config_host_mak
 fi
-echo "GLIB_CFLAGS=$glib_cflags" >> $config_host_mak
 if test "$gtk" = "yes" ; then
   echo "CONFIG_GTK=y" >> $config_host_mak
   echo "CONFIG_GTKABI=$gtkabi" >> $config_host_mak