[SYCL][ROCm] Fix missing arch diagnostic formatting

Author: npmiller

clang/include/clang/Basic/DiagnosticDriverKinds.td

@@ -290,7 +290,7 @@ def err_drv_expecting_fsycl_with_sycl_opt : Error<
 def err_drv_fsycl_with_c_type : Error<
   "'%0' must not be used in conjunction with '-fsycl', which expects C++ source">;
 def err_drv_sycl_missing_amdgpu_arch : Error<
-  "Missing AMDGPU architecture for SYCL offloading. Please specify it with -Xsycl-target-backend --offload-arch.">;
+  "missing AMDGPU architecture for SYCL offloading; specify it with '-Xsycl-target-backend --offload-arch'">;
 def warn_drv_sycl_offload_target_duplicate : Warning<
   "SYCL offloading target '%0' is similar to target '%1' already specified; "
   "will be ignored">, InGroup<SyclTarget>;

clang/test/Driver/sycl-offload-amdgcn.cpp

@@ -7,7 +7,7 @@
 // RUN: %clangxx -### -std=c++11 -target x86_64-unknown-linux-gnu -fsycl \
 // RUN: -fsycl-targets=amdgcn-amd-amdhsa-sycldevice %s 2>&1 \
 // RUN: | FileCheck -check-prefix=CHK-ARCH %s
-// CHK-ARCH: error: Missing AMDGPU architecture for SYCL offloading. Please specify it with -Xsycl-target-backend --offload-arch.
+// CHK-ARCH: error: missing AMDGPU architecture for SYCL offloading; specify it with '-Xsycl-target-backend --offload-arch'
 
 /// Check action graph.
 // RUN: %clangxx -### -std=c++11 -target x86_64-unknown-linux-gnu -fsycl \