linux-headers: bump 4.{8, 4, 1}.x and 3.{18, 12}.x series

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/linux-headers/Config.in.host

@@ -226,15 +226,15 @@ config BR2_DEFAULT_KERNEL_HEADERS
 	default "3.2.84"	if BR2_KERNEL_HEADERS_3_2
 	default "3.4.113"	if BR2_KERNEL_HEADERS_3_4
 	default "3.10.104"	if BR2_KERNEL_HEADERS_3_10
-	default "3.12.67"	if BR2_KERNEL_HEADERS_3_12
+	default "3.12.68"	if BR2_KERNEL_HEADERS_3_12
 	default "3.14.79"	if BR2_KERNEL_HEADERS_3_14
-	default "3.18.44"	if BR2_KERNEL_HEADERS_3_18
+	default "3.18.45"	if BR2_KERNEL_HEADERS_3_18
 	default "3.19.8"	if BR2_KERNEL_HEADERS_3_19
 	default "4.0.9"		if BR2_KERNEL_HEADERS_4_0
-	default "4.1.35"	if BR2_KERNEL_HEADERS_4_1
-	default "4.4.36"	if BR2_KERNEL_HEADERS_4_4
+	default "4.1.36"	if BR2_KERNEL_HEADERS_4_1
+	default "4.4.37"	if BR2_KERNEL_HEADERS_4_4
 	default "4.5.7"		if BR2_KERNEL_HEADERS_4_5
 	default "4.6.7"		if BR2_KERNEL_HEADERS_4_6
 	default "4.7.10"	if BR2_KERNEL_HEADERS_4_7
-	default "4.8.12"	if BR2_KERNEL_HEADERS_4_8
+	default "4.8.13"	if BR2_KERNEL_HEADERS_4_8
 	default BR2_DEFAULT_KERNEL_VERSION if BR2_KERNEL_HEADERS_VERSION