rustc_codegen_llvm: enable wasm in object crate

Otherwise we lose the ability to do crate-level LTO for wasm targets now
that we're loading our own bitcode sections instead of using LLVM to do
it.

Author: durin42

Cargo.lock

@@ -2454,6 +2454,7 @@ dependencies = [
  "rustc-std-workspace-alloc",
  "rustc-std-workspace-core",
  "ruzstd",
+ "wasmparser",
 ]
 
 [[package]]
@@ -5823,6 +5824,16 @@ version = "0.2.87"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ca6ad05a4870b2bf5fe995117d3728437bd27d7cd5f06f13c17443ef369775a1"
 
+[[package]]
+name = "wasmparser"
+version = "0.110.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1dfcdb72d96f01e6c85b6bf20102e7423bdbaad5c337301bab2bbf253d26413c"
+dependencies = [
+ "indexmap 2.0.0",
+ "semver",
+]
+
 [[package]]
 name = "web-sys"
 version = "0.3.61"

compiler/rustc_codegen_llvm/Cargo.toml

@@ -14,6 +14,7 @@ measureme = "10.0.0"
 object = { version = "0.32.0", default-features = false, features = [
     "std",
     "read",
+    "wasm",
 ] }
 tracing = "0.1"
 rustc_middle = { path = "../rustc_middle" }