[HIP] Always add -fnative-half-arguments-and-returns cmdline option.

This command-line option is now required while building the HIP
applications (mainly for the host side) after we enabled __fp16
args and return values with patches D133885 & D145345.

Author: cdevadas

clang/include/clang/Driver/Options.td

@@ -8102,7 +8102,7 @@ def fnative_half_type: Flag<["-"], "fnative-half-type">,
 def fnative_half_arguments_and_returns : Flag<["-"], "fnative-half-arguments-and-returns">,
   HelpText<"Use the native __fp16 type for arguments and returns (and skip ABI-specific lowering)">,
   MarshallingInfoFlag<LangOpts<"NativeHalfArgsAndReturns">>,
-  ImpliedByAnyOf<[open_cl.KeyPath, render_script.KeyPath, hlsl.KeyPath]>;
+  ImpliedByAnyOf<[open_cl.KeyPath, render_script.KeyPath, hlsl.KeyPath, hip.KeyPath]>;
 def fdefault_calling_conv_EQ : Joined<["-"], "fdefault-calling-conv=">,
   HelpText<"Set default calling convention">,
   Values<"cdecl,fastcall,stdcall,vectorcall,regcall,rtdcall">,

clang/test/SemaCUDA/fp16-arg-return.cu

@@ -1,5 +1,6 @@
 // RUN: %clang_cc1 -o - -triple amdgcn-amd-amdhsa -fcuda-is-device -fsyntax-only -verify %s
 // RUN: %clang_cc1 -o - -triple spirv64-amd-amdhsa -fcuda-is-device -fsyntax-only -verify %s
+// RUN: %clang_cc1 -o - -triple x86_64-unknown-gnu-linux -fsyntax-only -verify -xhip %s
 
 // expected-no-diagnostics