Move /src/test to /tests

src/test/ui/lint/lint-unknown-lint-cmdline.rs

@@ -1,9 +0,0 @@
-// compile-flags:-D bogus -D dead_cod
-
-// error-pattern:unknown lint: `bogus`
-// error-pattern:requested on the command line with `-D bogus`
-// error-pattern:unknown lint: `dead_cod`
-// error-pattern:requested on the command line with `-D dead_cod`
-// error-pattern:did you mean: `dead_code`
-
-fn main() { }