linux-headers: bump 3.{4,10,12,14,18}.x series

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/linux-headers/Config.in.host

@@ -173,14 +173,14 @@ config BR2_DEFAULT_KERNEL_HEADERS
 	string
 	default "3.0.101"	if BR2_KERNEL_HEADERS_3_0
 	default "3.2.66"	if BR2_KERNEL_HEADERS_3_2
-	default "3.4.105"	if BR2_KERNEL_HEADERS_3_4
-	default "3.10.67"	if BR2_KERNEL_HEADERS_3_10
+	default "3.4.106"	if BR2_KERNEL_HEADERS_3_4
+	default "3.10.68"	if BR2_KERNEL_HEADERS_3_10
 	default "3.11.10"	if BR2_KERNEL_HEADERS_3_11
-	default "3.12.36"	if BR2_KERNEL_HEADERS_3_12
+	default "3.12.37"	if BR2_KERNEL_HEADERS_3_12
 	default "3.13.11"	if BR2_KERNEL_HEADERS_3_13
-	default "3.14.31"	if BR2_KERNEL_HEADERS_3_14
+	default "3.14.32"	if BR2_KERNEL_HEADERS_3_14
 	default "3.15.10"	if BR2_KERNEL_HEADERS_3_15
 	default "3.16.7"	if BR2_KERNEL_HEADERS_3_16
 	default "3.17.8"	if BR2_KERNEL_HEADERS_3_17
-	default "3.18.5"	if BR2_KERNEL_HEADERS_3_18
+	default "3.18.6"	if BR2_KERNEL_HEADERS_3_18
 	default BR2_DEFAULT_KERNEL_VERSION if BR2_KERNEL_HEADERS_VERSION