packages: Add android-core to the build.

Change-Id: I8303ba2f97fa9f1dcde90259f06d3cd7f2f860e9
diff --git a/packages.mk b/packages.mk
index 11ceaf0..1c75969 100644
--- a/packages.mk
+++ b/packages.mk
@@ -118,6 +118,7 @@
 $(call make-pbuilder-package-target,$1,$2,$3,$4,$5,bsp)
 endef
 
+$(eval $(call make-pbuilder-package-target,android-core,android-core))
 $(eval $(call make-pbuilder-package-target,mendel-minimal,packages/mendel-minimal))
 $(eval $(call make-pbuilder-package-target,base-files,packages/base-files))
 $(eval $(call make-pbuilder-package-target,edgetpu,packages/edgetpu,,,binary))