ac/llvm: Don't use getTriple() on LLVM21+

setTargetTriple() takes a Triple now.

Reviewed-by: Konstantin Seurer <konstantin.seurer@gmail.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33981>

src/amd/llvm/ac_llvm_helper.cpp

@@ -97,7 +97,11 @@ LLVMModuleRef ac_create_module(LLVMTargetMachineRef tm, LLVMContextRef ctx)
    TargetMachine *TM = reinterpret_cast<TargetMachine *>(tm);
    LLVMModuleRef module = LLVMModuleCreateWithNameInContext("mesa-shader", ctx);
 
+#if LLVM_VERSION_MAJOR >= 21
+   unwrap(module)->setTargetTriple(TM->getTargetTriple());
+#else
    unwrap(module)->setTargetTriple(TM->getTargetTriple().getTriple());
+#endif
    unwrap(module)->setDataLayout(TM->createDataLayout());
    return module;
 }