gcc: mark 4.5.x as deprecated

It was kept for the internal blackfin toolchain which has been removed
since because of lack of maintenance and testing.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/gcc/Config.in.host

@@ -16,6 +16,7 @@ choice
 
 	config BR2_GCC_VERSION_4_5_X
 		bool "gcc 4.5.x"
+		depends on BR2_DEPRECATED_SINCE_2015_05
 		# Broken or unsupported architectures
 		depends on !BR2_microblaze && !BR2_aarch64 && !BR2_arc \
 			&& !BR2_powerpc64le && !BR2_nios2