linux-headers: bump 4.{4, 7}.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

@@ -240,8 +240,8 @@ config BR2_DEFAULT_KERNEL_HEADERS
 	default "4.1.32"	if BR2_KERNEL_HEADERS_4_1
 	default "4.2.8"		if BR2_KERNEL_HEADERS_4_2
 	default "4.3.6"		if BR2_KERNEL_HEADERS_4_3
-	default "4.4.22"	if BR2_KERNEL_HEADERS_4_4
+	default "4.4.23"	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 "4.7.5"		if BR2_KERNEL_HEADERS_4_7
+	default "4.7.6"		if BR2_KERNEL_HEADERS_4_7
 	default BR2_DEFAULT_KERNEL_VERSION if BR2_KERNEL_HEADERS_VERSION