Unbreak the GDB QUrl pretty printer test

Summary:
By changing the test client back to what it expects. Blindly also
adapt the LLDB test which introduced the regression in the first
place. Note that I cannot run the LLDB test locally, so I'm not
sure whether the test passes there.

Still, don't break GDB tests, people are using those...

Reviewers: KDevelop

Subscribers: kdevelop-devel

Differential Revision: https://phabricator.kde.org/D9922