linux-headers: bump 4.13.x series

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/linux-headers/Config.in.host

@@ -249,5 +249,5 @@ config BR2_DEFAULT_KERNEL_HEADERS
 	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
-	default "4.13.6"	if BR2_KERNEL_HEADERS_4_13
+	default "4.13.7"	if BR2_KERNEL_HEADERS_4_13
 	default BR2_DEFAULT_KERNEL_VERSION if BR2_KERNEL_HEADERS_VERSION