Bug 498934 - Use AC_HELP_STRING in gconf-2.m4
Bug 498934 - Use AC_HELP_STRING in gconf-2.m4

Fix missing AC_HELP_STRING usage and message quoting in gconf-2.m4 to
have a nicer configure --help output for all projects using gconf.

hyperair/gconf-gdbus,hyperair/gconf-gdbus,hyperair/gconf-gdbus,Distrotech/GConf,hyperair/gconf-gdbus,jessevdk/gconf,GNOME/gconf,jessevdk/gconf,GNOME/gconf,Distrotech/GConf,GNOME/gconf,Distrotech/GConf,Distrotech/GConf,GNOME/gconf,jessevdk/gconf