linux-headers: bump 4.4.x series to 4.4.65

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

package/linux-headers/Config.in.host

@@ -227,7 +227,7 @@ config BR2_DEFAULT_KERNEL_HEADERS
 	default "3.10.105"	if BR2_KERNEL_HEADERS_3_10
 	default "3.12.73"	if BR2_KERNEL_HEADERS_3_12
 	default "4.1.39"	if BR2_KERNEL_HEADERS_4_1
-	default "4.4.64"	if BR2_KERNEL_HEADERS_4_4
+	default "4.4.65"	if BR2_KERNEL_HEADERS_4_4
 	default "4.9.25"	if BR2_KERNEL_HEADERS_4_9
 	default "4.10.13"	if BR2_KERNEL_HEADERS_4_10
 	default "4.11"		if BR2_KERNEL_HEADERS_4_11