linux-headers: bump 4.{4, 9, 14, 18}.x series

Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/linux-headers/Config.in.host

@@ -254,9 +254,9 @@ config BR2_DEFAULT_KERNEL_HEADERS
 	string
 	default "3.2.102"	if BR2_KERNEL_HEADERS_3_2
 	default "4.1.52"	if BR2_KERNEL_HEADERS_4_1
-	default "4.4.155"	if BR2_KERNEL_HEADERS_4_4
-	default "4.9.126"	if BR2_KERNEL_HEADERS_4_9
-	default "4.14.69"	if BR2_KERNEL_HEADERS_4_14
+	default "4.4.156"	if BR2_KERNEL_HEADERS_4_4
+	default "4.9.127"	if BR2_KERNEL_HEADERS_4_9
+	default "4.14.70"	if BR2_KERNEL_HEADERS_4_14
 	default "4.16.18"	if BR2_KERNEL_HEADERS_4_16
-	default "4.18.7"	if BR2_KERNEL_HEADERS_4_18
+	default "4.18.8"	if BR2_KERNEL_HEADERS_4_18
 	default BR2_DEFAULT_KERNEL_VERSION if BR2_KERNEL_HEADERS_VERSION