Merge #6186

6186: Ignore .spv vulkan files for in-directory builds r=Chairn a=def-

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## Checklist

- [ ] Tested the change ingame
- [ ] Provided screenshots if it is a visual change
- [ ] Tested in combination with possibly related configuration options
- [ ] Written a unit test (especially base/) or added coverage to integration test
- [ ] Considered possible null pointers and out of bounds array indexing
- [ ] Changed no physics that affect existing maps
- [ ] Tested the change with [ASan+UBSan or valgrind's memcheck](https://github.com/ddnet/ddnet/#using-addresssanitizer--undefinedbehavioursanitizer-or-valgrinds-memcheck) (optional)


Co-authored-by: def <dennis@felsin9.de>

.gitignore

@@ -130,6 +130,7 @@ tags
 *.sdf
 *.sln
 *.so
+*.spv
 *.sqlite
 *.sqlite-shm
 *.sqlite-wal