Update libloading to 0.7.3

This was previously done in bfcf97b, but got
reverted due to a bug. The bug seems to be fixed now.

Fixes #1137

Author: bjorn3

Cargo.lock

@@ -20,7 +20,7 @@ object = { version = "0.29.0", default-features = false, features = ["std", "rea
 
 ar = { git = "https://github.com/bjorn3/rust-ar.git", branch = "do_not_remove_cg_clif_ranlib" }
 indexmap = "1.9.1"
-libloading = { version = "0.6.0", optional = true }
+libloading = { version = "0.7.3", optional = true }
 once_cell = "1.10.0"
 smallvec = "1.8.1"
 

Cargo.toml

@@ -318,7 +318,7 @@ fn dep_symbol_lookup_fn(
     let imported_dylibs = Box::leak(
         dylib_paths
             .into_iter()
-            .map(|path| libloading::Library::new(&path).unwrap())
+            .map(|path| unsafe { libloading::Library::new(&path).unwrap() })
             .collect::<Box<[_]>>(),
     );