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

@@ -242,8 +242,8 @@ config BR2_DEFAULT_KERNEL_HEADERS
 	string
 	default "3.2.99"	if BR2_KERNEL_HEADERS_3_2
 	default "4.1.49"	if BR2_KERNEL_HEADERS_4_1
-	default "4.4.121"	if BR2_KERNEL_HEADERS_4_4
-	default "4.9.87"	if BR2_KERNEL_HEADERS_4_9
+	default "4.4.122"	if BR2_KERNEL_HEADERS_4_4
+	default "4.9.88"	if BR2_KERNEL_HEADERS_4_9
 	default "4.10.17"	if BR2_KERNEL_HEADERS_4_10
 	default "4.11.12"	if BR2_KERNEL_HEADERS_4_11
 	default "4.12.14"	if BR2_KERNEL_HEADERS_4_12