Add CleanSpec for TZ Data artifacts under `/system/etc/tzdata_module`.

These artifatcs are no longer used on ART Buildbot's devices, as they
now use the Time Zone Data APEX.

(That these files are still used on Golem though, but the build system
will regenerate them).

Test: ART chroot-based on-device testing using the master-art branch
Test: ART chroot-based on-device testing using the master branch (with
      `TARGET_FLATTEN_APEX` set to `true` before building).
Bug: 132169989
Bug: 121117762

Change-Id: I20caf1016bb40da88751556c29ae3b89adb3f2b9
diff --git a/output_data/CleanSpec.mk b/output_data/CleanSpec.mk
index df1d3c5..9678692 100644
--- a/output_data/CleanSpec.mk
+++ b/output_data/CleanSpec.mk
@@ -59,6 +59,10 @@
 # mainline module APEX in ART's special on-device test environment.
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/etc/tz)
 
+# Remove on-device files that simulate time zone data files in the TZ data
+# mainline module APEX in ART's special on-device test environment.
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/etc/tzdata_module)
+
 # ************************************************
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
 # ************************************************