configs: nexbox_a95x_defconfig: bump to kernel 4.13.4

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

configs/nexbox_a95x_defconfig

@@ -7,7 +7,7 @@ BR2_ROOTFS_POST_BUILD_SCRIPT="board/nexbox/a95x/post-build.sh"
 BR2_ROOTFS_POST_IMAGE_SCRIPT="board/nexbox/a95x/post-image.sh"
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.13"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.13.4"
 BR2_LINUX_KERNEL_USE_ARCH_DEFAULT_CONFIG=y
 BR2_LINUX_KERNEL_DTS_SUPPORT=y
 BR2_LINUX_KERNEL_INTREE_DTS_NAME="amlogic/meson-gxbb-nexbox-a95x amlogic/meson-gxl-s905x-nexbox-a95x"