linux-headers: bump 4.18.x series

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/linux-headers/Config.in.host

@@ -258,5 +258,5 @@ config BR2_DEFAULT_KERNEL_HEADERS
 	default "4.9.125"	if BR2_KERNEL_HEADERS_4_9
 	default "4.14.68"	if BR2_KERNEL_HEADERS_4_14
 	default "4.16.18"	if BR2_KERNEL_HEADERS_4_16
-	default "4.18.5"	if BR2_KERNEL_HEADERS_4_18
+	default "4.18.7"	if BR2_KERNEL_HEADERS_4_18
 	default BR2_DEFAULT_KERNEL_VERSION if BR2_KERNEL_HEADERS_VERSION