bump libc to 0.2.171 to fix xous

[xobs]

Due to a reorganization in the libc crate, the xous target broke with version 0.2.170. Bump libc to 0.2.171 to fix nightly.

[rustbot]

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[rustbot]

These commits modify the library/Cargo.lock file. Unintentional changes to library/Cargo.lock can be introduced when switching branches and rebasing PRs.

If this was unintentional then you should revert the changes before this PR is merged.
Otherwise, you can ignore this comment.

[xobs]

An example of the build failures with 0.2.170:

error[E0412]: cannot find type `c_int` in this scope
  --> /home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/libc-0.2.170/src/xous.rs:15:20
   |
15 | pub const INT_MIN: c_int = -2147483648;
   |                    ^^^^^ not found in this scope
   |
help: consider importing one of these type aliases
   |
3  + use crate::c_int;
   |
3  + use rustc_std_workspace_core::ffi::c_int;
   |

error[E0412]: cannot find type `c_int` in this scope
  --> /home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/libc-0.2.170/src/xous.rs:16:20
   |
16 | pub const INT_MAX: c_int = 2147483647;
   |                    ^^^^^ not found in this scope
   |
help: consider importing one of these type aliases
   |
3  + use crate::c_int;
   |
3  + use rustc_std_workspace_core::ffi::c_int;
   |

For more information about this error, try `rustc --explain E0412`.
error: could not compile `libc` (lib) due to 2 previous errors

[jhpratt]

@bors r+

[bors]

📌 Commit e185493 has been approved by jhpratt

It is now in the queue for this repository.