Rollup merge of #118851 - bzEq:std-xcoff, r=Mark-Simulacrum

[std] Add xcoff in object's feature list

object-0.32.0 has supported XCOFF format. And backtrace in submodule has been updated to support XCOFF and AIX. Add `xcoff` to supported feature list to make backtrace built on AIX.

library/std/Cargo.toml

@@ -30,8 +30,13 @@ rustc-demangle = { version = "0.1.21", features = ['rustc-dep-of-std'] }
 [target.'cfg(not(all(windows, target_env = "msvc", not(target_vendor = "uwp"))))'.dependencies]
 miniz_oxide = { version = "0.7.0", optional = true, default-features = false }
 addr2line = { version = "0.21.0", optional = true, default-features = false }
+
+[target.'cfg(all(not(target_os = "aix"), not(all(windows, target_env = "msvc", not(target_vendor = "uwp")))))'.dependencies]
 object = { version = "0.32.0", default-features = false, optional = true, features = ['read_core', 'elf', 'macho', 'pe', 'unaligned', 'archive'] }
 
+[target.'cfg(target_os = "aix")'.dependencies]
+object = { version = "0.32.0", default-features = false, optional = true, features = ['read_core', 'xcoff', 'unaligned', 'archive'] }
+
 [dev-dependencies]
 rand = { version = "0.8.5", default-features = false, features = ["alloc"] }
 rand_xorshift = "0.3.0"