add support for loongarch

[wuruilong01]

The package failed to compile at loong64 for the following detailed reasons:https://buildd.debian.org/status/fetch.php?pkg=universal-ctags&arch=loong64&ver=5.9.20210829.0-1&stamp= 1709418146&raw=0

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 85.38%. Comparing base (5e26443) to head (1673103).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #3958 +/- ## ======================================= Coverage 85.38% 85.38% ======================================= Files 235 235 Lines 56543 56543 ======================================= Hits 48282 48282 Misses 8261 8261 ```

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[masatake]

Thank you.