zenfone8: Set BOARD_KERNEL_BINARIES for QGKI

Set BOARD_KERNEL_BINARIES for QGKI as 'kernel kernel-gki' as
an additional, GKI kernel, has to be build along with the QGKI
kernel if the defconfig is chosen as <target>-qgki_defconfig.

Change-Id: Icb6eb45c85bec9019804a61b40d666203c006e56
diff --git a/BoardConfig.mk b/BoardConfig.mk
index 88aed9d..26942c0 100755
--- a/BoardConfig.mk
+++ b/BoardConfig.mk
@@ -141,6 +141,7 @@
 BOARD_SYSTEM_EXTIMAGE_FILE_SYSTEM_TYPE := ext4
 BOARD_ODMIMAGE_FILE_SYSTEM_TYPE := ext4
 BOARD_BOOTIMAGE_PARTITION_SIZE := 100663296
+BOARD_KERNEL_BINARIES := kernel kernel-gki
 BOARD_KERNEL-GKI_BOOTIMAGE_PARTITION_SIZE := $(BOARD_BOOTIMAGE_PARTITION_SIZE)
 BOARD_VENDOR_BOOTIMAGE_PARTITION_SIZE := 100663296
 BOARD_DTBOIMG_PARTITION_SIZE := 8388608