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

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 50cd46b39f4af495a4c9d15f0e5d3df272e33c7c)
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 "4.1.49"	if BR2_KERNEL_HEADERS_4_1
-	default "4.4.121"	if BR2_KERNEL_HEADERS_4_4
+	default "4.4.122"	if BR2_KERNEL_HEADERS_4_4
 	default "4.8.17"	if BR2_KERNEL_HEADERS_4_8
-	default "4.9.87"	if BR2_KERNEL_HEADERS_4_9
+	default "4.9.88"	if BR2_KERNEL_HEADERS_4_9
 	default BR2_DEFAULT_KERNEL_VERSION if BR2_KERNEL_HEADERS_VERSION