gcc: mark 4.7.x as deprecated

We're already using 4.9.x as default, and have 4.8.x on the lower side
together with 5.x (5.3.0) on the higher side.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/gcc/Config.in.host

@@ -41,6 +41,7 @@ choice
 
 	config BR2_GCC_VERSION_4_7_X
 		bool "gcc 4.7.x"
+		depends on BR2_DEPRECATED_SINCE_2016_05
 		# Broken or unsupported architectures
 		depends on !BR2_microblaze && !BR2_aarch64 && !BR2_arc \
 			&& !BR2_powerpc64le && !BR2_nios2