New review comment by sgn on void-packages repository

https://github.com/void-linux/void-packages/pull/48154#discussion_r1452843479

Comment:
```suggestion
CMake doesn't find_path ctags properly when crossbuilding.
The CTAGS_SUBMODULE variable is never used though,
and ctags are still built and installed properly
diff --git a/CMakeLists.txt b/CMakeLists.txt
```