blackbox: deprecate package due to dead upstream

There has been no Blackbox release since 2005, which indicates that
the upstream project is dead. Since there are many other maintained
and alive window manager projects around, I'd like to nominate
Blackbox for deprecation.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/blackbox/Config.in

@@ -3,6 +3,8 @@ config BR2_PACKAGE_BLACKBOX
 	depends on BR2_PACKAGE_XORG7
 	depends on BR2_INSTALL_LIBSTDCPP
 	depends on BR2_USE_MMU # fork()
+	# upstream dead since 2005
+	depends on BR2_DEPRECATED_SINCE_2014_08
 	select BR2_PACKAGE_LIBICONV if !BR2_ENABLE_LOCALE
 	select BR2_PACKAGE_XLIB_LIBX11
 	help