[2/2] omni: add OTA script do delete package cache

after flashing new image delete contents of /data/system/package_cache/
to make sure they are recreated. Outdated cache files are the
reason for the famous 'resource derps'

Change-Id: Iaf1f113a64242254b8fb33bc5b9fdef0c9fdb120
diff --git a/config/common.mk b/config/common.mk
index 1a53295..448e232 100644
--- a/config/common.mk
+++ b/config/common.mk
@@ -34,8 +34,8 @@
 PRODUCT_COPY_FILES += \
     vendor/omni/prebuilt/bin/backuptool.sh:system/bin/backuptool.sh \
     vendor/omni/prebuilt/bin/backuptool.functions:system/bin/backuptool.functions \
-    vendor/omni/prebuilt/bin/50-hosts.sh:system/addon.d/50-hosts.sh \
-    vendor/omni/prebuilt/bin/blacklist:system/addon.d/blacklist
+    vendor/omni/prebuilt/bin/blacklist:system/addon.d/blacklist \
+    vendor/omni/prebuilt/bin/clean_cache.sh:system/bin/clean_cache.sh
 
 # Backup Services whitelist
 PRODUCT_COPY_FILES += \