[OpenMP][Driver] Adds --opaque-offload-linker option to Clang options

Fixes visibility for --opaque-offload-linker and --no-opaque-offload-linker to be visible Clang and CC1 option.
Removes necessity of specifying option after -Xclang

Change-Id: I5c724dc8389d079ba80330b24686917630e9e3ea

clang/include/clang/Driver/Options.td

@@ -3467,9 +3467,9 @@ defm openmp_optimistic_collapse : BoolFOption<"openmp-optimistic-collapse",
   NegFlag<SetFalse>, BothFlags<[NoArgumentUnused, HelpHidden], []>>;
 def static_openmp: Flag<["-"], "static-openmp">,
   HelpText<"Use the static host OpenMP runtime while linking.">;
-def opaque_offload_linker : Flag<["--"], "opaque-offload-linker">, Visibility<[CC1Option]>, Group<f_Group>,
+def opaque_offload_linker : Flag<["--"], "opaque-offload-linker">, Visibility<[ClangOption, CC1Option]>, Group<f_Group>,
   HelpText<"Build/link omp offload binary, construct opaque cmd list instead of single clang-linker-wrapper cmd.">;
-def no_opaque_offload_linker : Flag<["--"], "no-opaque-offload-linker">, Visibility<[CC1Option]>, Group<f_Group>,
+def no_opaque_offload_linker : Flag<["--"], "no-opaque-offload-linker">, Visibility<[ClangOption, CC1Option]>, Group<f_Group>,
   HelpText<"Build/link omp offload binary, using single clang-linker-wrapper cmd.">;
 def fopenmp_new_driver : Flag<["-"], "fopenmp-new-driver">, Flags<[HelpHidden]>,
   HelpText<"Use the new driver for OpenMP offloading.">;