[clang] [AMDGPU] Correctly pass the target-id to `ld.lld` (PR #101037)

[Matt Arsenault via cfe-commits]

================
@@ -634,7 +634,17 @@ void amdgpu::Linker::ConstructJob(Compilation &C, const JobAction &JA,
                   C.getDriver().getLTOMode() == LTOK_Thin);
   else if (Args.hasArg(options::OPT_mcpu_EQ))
----------------
arsenm wrote:

Braces 

https://github.com/llvm/llvm-project/pull/101037