linux-headers: bump 4.{4, 9, 11}.x series

[Peter: drop 4.11.x bump]
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 13a6a126fcfbfe63690955f0fb0c3118358049cc)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/linux-headers/Config.in.host

@@ -222,7 +222,7 @@ config BR2_DEFAULT_KERNEL_HEADERS
 	default "3.19.8"	if BR2_KERNEL_HEADERS_3_19
 	default "4.0.9"		if BR2_KERNEL_HEADERS_4_0
 	default "4.1.40"	if BR2_KERNEL_HEADERS_4_1
-	default "4.4.70"	if BR2_KERNEL_HEADERS_4_4
+	default "4.4.71"	if BR2_KERNEL_HEADERS_4_4
 	default "4.8.17"	if BR2_KERNEL_HEADERS_4_8
-	default "4.9.30"	if BR2_KERNEL_HEADERS_4_9
+	default "4.9.31"	if BR2_KERNEL_HEADERS_4_9
 	default BR2_DEFAULT_KERNEL_VERSION if BR2_KERNEL_HEADERS_VERSION