Config.in: add symbols for BR2_HOST_GCC_AT_LEAST_4_6

This option is needed to fix the Kodi build with older host gcc
versions.

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

Config.in

@@ -23,9 +23,14 @@ config BR2_HOST_GCC_VERSION
 	string
 	option env="HOST_GCC_VERSION"
 
+config BR2_HOST_GCC_AT_LEAST_4_6
+	bool
+	default y if BR2_HOST_GCC_VERSION = "4 6"
+
 config BR2_HOST_GCC_AT_LEAST_4_7
 	bool
 	default y if BR2_HOST_GCC_VERSION = "4 7"
+	select BR2_HOST_GCC_AT_LEAST_4_6
 
 config BR2_HOST_GCC_AT_LEAST_4_8
 	bool