Add amdgcn-amd-amdhsa triple to libdevice test

Test whether SYCL Codegen does not emit llvm intrinsics for
amdgcn-amd-amdhsa and libdevice functions can be correctly linked
later on.

Author: Martin Wehking

clang/test/CodeGenSYCL/sycl-libdevice-cmath.cpp

@@ -5,8 +5,10 @@
 // intrinsics. This allows the driver to link in the libdevice definitions for
 // cosf etc. later in the driver flow.
 
-// RUN: %clang_cc1 %s -fsycl-is-device -triple nvptx64-nvidia-cuda -emit-llvm -o - | FileCheck %s 
+// RUN: %clang_cc1 %s -fsycl-is-device -triple nvptx64-nvidia-cuda -emit-llvm -o - | FileCheck %s
 // RUN: %clang_cc1 %s -fsycl-is-device -triple nvptx64-nvidia-cuda -ffast-math -emit-llvm -o - | FileCheck %s
+// RUN: %clang_cc1 %s -fsycl-is-device -triple amdgcn-amd-amdhsa -emit-llvm -o - | FileCheck %s
+// RUN: %clang_cc1 %s -fsycl-is-device -triple amdgcn-amd-amdhsa -ffast-math -emit-llvm -o - | FileCheck %s
 
 #include "Inputs/sycl.hpp"