Rollup merge of #78307 - rust-lang:revert-77961-embed-bitcode, r=tmandry

Revert "Set .llvmbc and .llvmcmd sections as allocatable"

Reverts #77961, see discussion starting from #77961 (comment)

Author: jonas-schievink

Diff for: compiler/rustc_codegen_llvm/src/back/write.rs

@@ -936,8 +936,8 @@ unsafe fn embed_bitcode(
         llvm::LLVMRustAppendModuleInlineAsm(llmod, asm.as_ptr().cast(), asm.len());
     } else {
         let asm = "
-            .section .llvmbc,\"a\"
-            .section .llvmcmd,\"a\"
+            .section .llvmbc,\"e\"
+            .section .llvmcmd,\"e\"
         ";
         llvm::LLVMRustAppendModuleInlineAsm(llmod, asm.as_ptr().cast(), asm.len());
     }