[clangd] Increase the timeouts in TUScheduler tests to 10 seconds.
[clangd] Increase the timeouts in TUScheduler tests to 10 seconds.

Some of them timeout on our buildbots in certain configurations.
The timeouts are there to avoid hanging indefinitely on deadlocks, so
the exact number we put there does not matter.

git-svn-id: a34e9779ed74578ad5922b3306b3d80a0c825546@340523 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/clang-tools-extra,llvm-mirror/clang-tools-extra,llvm-mirror/clang-tools-extra,llvm-mirror/clang-tools-extra