[clang] [LoongArch] Add FreeBSD targets (PR #119191)

[WÁNG Xuěruì via cfe-commits]

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@@ -223,6 +231,12 @@ void freebsd::Linker::ConstructJob(Compilation &C, const JobAction &JA,
       CmdArgs.push_back("--no-relax");
   }
 
+  if (Triple.isLoongArch64()) {
+    CmdArgs.push_back("-X");
+    if (Args.hasArg(options::OPT_mno_relax))
+      CmdArgs.push_back("--no-relax");
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xen0n wrote:

Ah I missed the `hasArg` part. I have no problem with it then...

https://github.com/llvm/llvm-project/pull/119191