applypatch: Use static libs for libbrotli and libbz.

Prior to this CL, applypatch was the only user of libbrotli.so and
libbz.so (update_engine and puffin have been using the static versions).
This CL switches applypatch to their static versions to save space in
/system.

Sizes prior to the change (aosp_taimen-userdebug):
  /system/bin/applypatch      91296
  /system/lib64/libbrotli.so 688536
  /system/lib64/libbz.so      79560

After:
  /system/bin/applypatch     272368

Test: `m dist`
Test: Check the built blueline-userdebug target. libbrotli.so and
      libbz.so are not installed.
Change-Id: I08422a0d5a287bbac69aa9f6cfd9c97e5b2e9078
diff --git a/CleanSpec.mk b/CleanSpec.mk
index 8405d20..0980a35 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -58,6 +58,9 @@
 $(call add-clean-step, find $(OUT_DIR) -type f -name "SystemUpdaterSample*" -print0 | xargs -0 rm -f)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/priv-app/SystemUpdaterSample)
 
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/lib*/libbrotli.so)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/lib*/libbz.so)
+
 # ************************************************
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
 # ************************************************