Fixes language server issue when empty file is removed from verible.filelist

[sconwayaus]

Resolves #2178

This PR resolves issue where removing an empty file from the verible.filelist causes the language server to stop.

[sconwayaus]

Not sure why the arm64 CI tests are failing.

2024-05-09T11:04:04.8418356Z �[32;1m11:04:04�[0m | �[34;1m+ case "$MODE" in�[0m
2024-05-09T11:04:04.8421500Z �[32;1m11:04:04�[0m | �[34;1m+ bazel test --keep_going --cache_test_results=no --test_output=errors -c opt --noshow_progress --cxxopt=-fno-exceptions --cxxopt=-Werror --cxxopt=-W --cxxopt=-Wall --cxxopt=-Wextra --cxxopt=-Wunreachable-code --cxxopt=-Wno-unused-parameter --cxxopt=-Wno-missing-field-initializers --cxxopt=-Wno-redundant-move --cxxopt=-Wno-unused-label --cxxopt=-Wno-type-limits --cxxopt=-Wno-uninitialized //...�[0m
2024-05-09T11:04:04.8439829Z �[31;1m11:04:04�[0m | Extracting Bazel installation...
2024-05-09T11:04:10.9498966Z �[31;1m11:04:10�[0m | Starting local Bazel server and connecting to it...
2024-05-09T11:04:19.9469694Z �[31;1m11:04:19�[0m | 
2024-05-09T11:04:19.9471949Z �[31;1m11:04:19�[0m | Server terminated abruptly (error code: 14, error message: 'Socket closed', log file: '/root/.cache/bazel/_bazel_root/8f7974adf68934c9ed4690a59b110572/server/jvm.out')
2024-05-09T11:04:19.9502949Z �[31;1m11:04:19�[0m | 
2024-05-09T11:04:19.9660175Z ##[error]Process completed with exit code 37.
2024-05-09T11:04:19.9756215Z ##[group]Run actions/upload-artifact@v3

Any thoughts?

[IEncinas10]

It happened to me too, I wouldn't worry too much. I think owners of the repo can launch the testing pipeline again.

I guess if you add new commits it will launch itself again too