Update faerie, remove usage of failure (#591)

This commit removes the usage of the `failure` crate and finishes up the
final pieces of the migration to `std::error::Error` and `anyhow`. The
`faerie` crate was updated to pull in its migration from `failure` to
`anyhow` as well.

crates/debug/src/transform/line_program.rs

@@ -3,9 +3,9 @@ use super::attr::clone_attr_string;
 use super::{Reader, TransformError};
 use alloc::collections::BTreeMap;
 use alloc::vec::Vec;
+use anyhow::Error;
 use core::iter::FromIterator;
 use cranelift_entity::EntityRef;
-use failure::Error;
 use gimli::{
     write, DebugLine, DebugLineOffset, DebugStr, DebuggingInformationEntry, LineEncoding, Unit,
 };