coverage: Migrate tests/run-coverage into tests/coverage

tests/run-coverage/coroutine.coverage

@@ -1,32 +0,0 @@
-   LL|       |#![feature(coroutines, coroutine_trait)]
-   LL|       |
-   LL|       |use std::ops::{Coroutine, CoroutineState};
-   LL|       |use std::pin::Pin;
-   LL|       |
-   LL|       |// The following implementation of a function called from a `yield` statement
-   LL|       |// (apparently requiring the Result and the `String` type or constructor)
-   LL|       |// creates conditions where the `coroutine::StateTransform` MIR transform will
-   LL|       |// drop all `Counter` `Coverage` statements from a MIR. `simplify.rs` has logic
-   LL|       |// to handle this condition, and still report dead block coverage.
-   LL|      1|fn get_u32(val: bool) -> Result<u32, String> {
-   LL|      1|    if val { Ok(1) } else { Err(String::from("some error")) }
-                                          ^0
-   LL|      1|}
-   LL|       |
-   LL|      1|fn main() {
-   LL|      1|    let is_true = std::env::args().len() == 1;
-   LL|      1|    let mut coroutine = || {
-   LL|      1|        yield get_u32(is_true);
-   LL|      1|        return "foo";
-   LL|      1|    };
-   LL|       |
-   LL|      1|    match Pin::new(&mut coroutine).resume(()) {
-   LL|      1|        CoroutineState::Yielded(Ok(1)) => {}
-   LL|      0|        _ => panic!("unexpected return from resume"),
-   LL|       |    }
-   LL|      1|    match Pin::new(&mut coroutine).resume(()) {
-   LL|      1|        CoroutineState::Complete("foo") => {}
-   LL|      0|        _ => panic!("unexpected return from resume"),
-   LL|       |    }
-   LL|      1|}
-