[Question] How to create prebuilt version of sdk from scripts

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### [REQUIRED] Please fill in the following fields:

* Pre-built SDK from the [website](https://firebase.google.com/download/cpp) or open-source from this repo: open-source from this repo
* Firebase C++ SDK version: 12.5.0
* Main Firebase Components in concern: all
* Other Firebase Components in use: all
* Platform you are using the C++ SDK on: Linux
* Platform you are targeting: desktop (iOS, Android, and/or desktop)

### [REQUIRED] Please describe the question here:

What's up guys. Sorry for stupid (maybe) question.

I build firebase sdk from sources.
How can I get prebuilt versrion of sdk from script?

I invoke:
`./build_scripts/desktop/package.sh -b /home/era/Work/firebase-cpp-sdk/build -o /home/era/Work/firebase-cpp-sdk/release -p linux -t /usr/bin -j 28 -L`

But, there are no some include files and folders. Here what i get.



But, if we look at the prebuilt version of sdk (zip file) you will see more files
For ex, the include files from prebuilt version


As you can see, there are more files.
What I do wrong?

Beginne mit build_scripts/desktop/package.sh und reproduziere den bereitgestellten Befehl unter Verwendung der angegebenen Build- und Ausgabepfade. Vergleiche den von ihm erzeugten Include-Baum mit dem heruntergeladenen vorgefertigten SDK und verfolge, welche Packaging-Eingaben die Unterschiede steuern. Als abgeschlossen gilt die Aufgabe, wenn die korrekte Invocation identifiziert oder die Packaging-Lücke auf Repository-Seite dokumentiert wurde.

Vom Indexierungsmodell aus dem Issue-Text verfasst.