Add OpenHarmony targets

- `aarch64-unknown-linux-ohos`
- `armv7-unknown-linux-ohos`

Author: Amanieu

compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp

@@ -421,6 +421,10 @@ extern "C" LLVMTargetMachineRef LLVMRustCreateTargetMachine(
   }
   Options.RelaxELFRelocations = RelaxELFRelocations;
   Options.UseInitArray = UseInitArray;
+  if (ForceEmulatedTls) {
+    Options.ExplicitEmulatedTLS = true;
+    Options.EmulatedTLS = true;
+  }
 
 #if LLVM_VERSION_LT(17, 0)
   if (ForceEmulatedTls) {

src/bootstrap/lib.rs

@@ -153,6 +153,8 @@ const EXTRA_CHECK_CFGS: &[(Option<Mode>, &'static str, Option<&[&'static str]>)]
     // Needed to avoid the need to copy windows.lib into the sysroot.
     (Some(Mode::Rustc), "windows_raw_dylib", None),
     (Some(Mode::ToolRustc), "windows_raw_dylib", None),
+    // #[cfg(bootstrap)] ohos
+    (Some(Mode::Std), "target_env", Some(&["ohos"])),
 ];
 
 /// A structure representing a Rust compiler.