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/intrinsic-unreachable/exit-ret.rs

@@ -1,4 +1,4 @@
-#![crate_type="lib"]
+#![crate_type = "lib"]
 use std::arch::asm;
 
 #[deny(unreachable_code)]

tests/run-make/intrinsic-unreachable/exit-unreachable.rs

@@ -1,5 +1,5 @@
 #![feature(core_intrinsics)]
-#![crate_type="lib"]
+#![crate_type = "lib"]
 use std::arch::asm;
 
 use std::intrinsics;