add LuaCov coverage tooling to ignore list

LuaCov: https://github.com/keplerproject/luacov

Files: https://keplerproject.github.io/luacov/doc/modules/luacov.defaults.html#statsfile

Lua.gitignore

@@ -6,6 +6,10 @@ luac.out
 *.zip
 *.tar.gz
 
+# LuaCov coverage reports
+luacov.stats.out
+luacov.report.out
+
 # Object files
 *.o
 *.os