zenfone8: Copy fstab.qcom into vendor first stage ramdisk

Change-Id: Ifdd163fd3625b1c0e193bdb5925be9d8b9da5e86
diff --git a/device.mk b/device.mk
index 270e64a..9c5049e 100755
--- a/device.mk
+++ b/device.mk
@@ -163,7 +163,7 @@
 
 # Ramdisk
 PRODUCT_COPY_FILES += \
-    $(LOCAL_PATH)/fstab.qcom:$(TARGET_COPY_OUT_RAMDISK)/fstab.qcom
+    $(LOCAL_PATH)/fstab.qcom:$(TARGET_COPY_OUT_VENDOR_RAMDISK)/first_stage_ramdisk/fstab.qcom
 
 # Remove unwanted packages
 PRODUCT_PACKAGES += \