Add a missing \ at the end of the line

This will make it easier to do a revert for future commits.

Test: foo
Bug: foo
Change-Id: Ifa18e2c6df510932097044462a4720ebb996c8d1
diff --git a/host_package.mk b/host_package.mk
index cb151cd..6f01142 100644
--- a/host_package.mk
+++ b/host_package.mk
@@ -70,7 +70,7 @@
 
 cvd_host_configs := \
     system-root.dtb \
-    initrd-root.dtb
+    initrd-root.dtb \
 
 cvd_host_package_files := \
      $(addprefix config/,$(cvd_host_configs)) \