zenfone8: Add vendor checkpoint_gc

Change-Id: I9749fcbe9f385fab28dd7cb5d30a6773df19e2ce
diff --git a/device.mk b/device.mk
index 6406afa..2f58dd7 100755
--- a/device.mk
+++ b/device.mk
@@ -48,6 +48,12 @@
     FILESYSTEM_TYPE_system=ext4 \
     POSTINSTALL_OPTIONAL_system=true
 
+AB_OTA_POSTINSTALL_CONFIG += \
+    RUN_POSTINSTALL_vendor=true \
+    POSTINSTALL_PATH_vendor=bin/checkpoint_gc \
+    FILESYSTEM_TYPE_vendor=ext4 \
+    POSTINSTALL_OPTIONAL_vendor=true
+
 PRODUCT_PACKAGES += \
     omnipreopt_script