tests clang-tidy ignore eadability-function-size

src/systemcmds/tests/.clang-tidy

@@ -64,6 +64,7 @@ Checks:          '*
 		,-readability-avoid-const-params-in-decls
 		,-readability-braces-around-statements
 		,-readability-else-after-return
+		,-readability-function-size
 		,-readability-implicit-bool-cast
 		,-readability-inconsistent-declaration-parameter-name
 		,-readability-named-parameter