Rollup of 8 pull requests

[Centril]

Successful merges:

• Prefer statx on linux if available #65094 (Prefer statx on linux if available)
• make File::try_clone produce non-inheritable handles on Windows #65316 (make File::try_clone produce non-inheritable handles on Windows)
• InterpCx: make memory field public #65319 (InterpCx: make memory field public)
• Don't recommend ONCE_INIT in std::sync::Once #65461 (Don't recommend ONCE_INIT in std::sync::Once)
• Move syntax::ext to a syntax_expand and refactor some attribute logic #65465 (Move syntax::ext to a syntax_expand and refactor some attribute logic)
• Update libc to 0.2.64 #65469 (Update libc to 0.2.64)
• add example for type_name #65475 (add example for type_name)
• fmt::Write is about string slices, not byte slices #65478 (fmt::Write is about string slices, not byte slices)

Failed merges:

r? @ghost

[Centril]

@bors r+ p=8 rollup=never

[bors]

📌 Commit c10e5c4 has been approved by Centril

[bors]

⌛ Testing commit c10e5c4 with merge bd0b4f6...

[bors]

💔 Test failed - checks-azure

[rust-highfive]

The job asmjs of your PR failed (pretty log, raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

Click to expand the log.

2019-10-17T01:55:39.8202146Z 
2019-10-17T01:55:42.5319437Z error[E0308]: mismatched types
2019-10-17T01:55:42.5320092Z    --> src/libstd/sys/unix/fs.rs:790:52
2019-10-17T01:55:42.5320751Z     |
2019-10-17T01:55:42.5322271Z 790 |         let n = cvt(unsafe { lseek64(self.0.raw(), pos, whence) })?;
2019-10-17T01:55:42.5323454Z     |                                                    |
2019-10-17T01:55:42.5324056Z     |                                                    expected i64, found i32
2019-10-17T01:55:42.5324056Z     |                                                    expected i64, found i32
2019-10-17T01:55:42.5324689Z     |                                                    help: you can convert an `i32` to `i64`: `pos.into()`
2019-10-17T01:55:42.7080448Z error: aborting due to previous error
2019-10-17T01:55:42.7080661Z 
2019-10-17T01:55:42.7081710Z For more information about this error, try `rustc --explain E0308`.
2019-10-17T01:55:42.7561945Z [RUSTC-TIMING] std test:false 3.155
---
2019-10-17T01:55:42.7683064Z == clock drift check ==
2019-10-17T01:55:42.7701865Z   local time: Thu Oct 17 01:55:42 UTC 2019
2019-10-17T01:55:42.8760618Z   network time: Thu, 17 Oct 2019 01:55:42 GMT
2019-10-17T01:55:42.8761469Z == end clock drift check ==
2019-10-17T01:55:47.2666837Z ##[error]Bash exited with code '1'.
2019-10-17T01:55:47.2705667Z ##[section]Starting: Upload CPU usage statistics
2019-10-17T01:55:47.2719620Z ==============================================================================
2019-10-17T01:55:47.2719754Z Task         : Bash
2019-10-17T01:55:47.2719825Z Description  : Run a Bash script on macOS, Linux, or Windows

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