Run rustfmt on tests/run-make/.

With the exception of `tests/run-make/translation/test.rs`, which has a
syntax error.

The expected output in `rustdoc-error-lines/rmake.rs`'s required slight
tweaking.

The two `reproducible-build.rs` files need `// ignore-tidy-linelength`
because rustfmt produces lines longer than 100 chars, which tidy doesn't
like, yuk.

tests/run-make/a-b-a-linker-guard/a.rs

@@ -2,7 +2,7 @@
 #![crate_type = "dylib"]
 
 #[cfg(x)]
-pub fn foo(x: u32) { }
+pub fn foo(x: u32) {}
 
 #[cfg(y)]
-pub fn foo(x: i32) { }
+pub fn foo(x: i32) {}