translation-update-upstream-embedded.sh is a script that can be used
without translation-update-upstream package.

How to use it:

1. Create .tlst and .hook files and run ./upstream-collect.sh as you do
with translation-update-upstream.

2. Create an archive that contains:
   - directory translation-update-upstream with:
     - translation-update-upstream-embedded.sh
     - msgheadermerge*
     - directory po that contains contents of the archive created in step 1.

3. Instead of call of translation-update-upstream in the spec file use
translation-update-upstream/translation-update-upstream-embedded.sh.
Arguments and style of use are the same.