Move two cast_lossless tests to their correct files

[phansch]

First part of checking off the tests/ui/cast.rs checkbox in #3630.

[matthiaskrgr]

Just needs rustfmt

+++set +ex
Diff in /Users/travis/build/rust-lang/rust-clippy/tests/ui/cast.rs at line 2:
     clippy::cast_precision_loss,
     clippy::cast_possible_truncation,
     clippy::cast_sign_loss,
-    clippy::cast_possible_wrap,
+    clippy::cast_possible_wrap
 )]
 #[allow(clippy::no_effect, clippy::unnecessary_operation)]
 fn main() {
tests/ui/cast.rs needs reformatting!
+++'[' true == true ']'
+++echo 'Tests need reformatting!'
Tests need reformatting!

[flip1995]

@bors r+

[bors]

📌 Commit 8163a1a has been approved by flip1995

[bors]

⌛ Testing commit 8163a1a with merge 9130c76...

[bors]

💔 Test failed - status-appveyor

[flip1995]

Is AppVeyor in shreds again?

@bors retry

[phansch]

Looks like some networking issues:

error: failed to download from `https://crates.io/api/v1/crates/cargo_metadata/0.7.4/download`
Caused by:
  [6] Couldn't resolve host name (Could not resolve host: static.crates.io)

[bors]

⌛ Testing commit 8163a1a with merge 6feed27...

[bors]

☀️ Test successful - checks-travis, status-appveyor
Approved by: flip1995
Pushing 6feed27 to master...