There's a merged pull request on the void-packages repository

cross-vpkg-dummy: provide libthread_db.so.1 on glibc
https://github.com/void-linux/void-packages/pull/42736

Description:
this should fix issues with openjdk11-jre in makedepends and "verify repository state" CI on cross:

```
openjdk11-jre-11.0.12+7_4: broken, unresolvable shlib `libthread_db.so.1'
Transaction aborted due to unresolved shlibs.
```

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#### Testing the changes
- I tested the changes in this PR: **YES**

before:
```
[DEBUG] xbps_transaction_check_shlibs: checking for `libthread_db.so.1': not found
```
after:
```
[DEBUG] xbps_transaction_check_shlibs: checking for `libthread_db.so.1': provided by `cross-vpkg-dummy-0.39_4'
```