[Driver] Remove unneeded RenderAsInput flag

RenderAsInput is for -Wa,/-Wl, style options which forward their values
as used by llvm::opt::Arg::renderAsInput. These short options don't use RenderAsInput.

Author: MaskRay

clang/include/clang/Driver/Options.td

@@ -830,7 +830,7 @@ def Xopenmp_target : Separate<["-"], "Xopenmp-target">, Group<CompileOnly_Group>
 def Xopenmp_target_EQ : JoinedAndSeparate<["-"], "Xopenmp-target=">, Group<CompileOnly_Group>,
   HelpText<"Pass <arg> to the target offloading toolchain identified by <triple>.">,
   MetaVarName<"<triple> <arg>">;
-def z : Separate<["-"], "z">, Flags<[LinkerInput, RenderAsInput]>,
+def z : Separate<["-"], "z">, Flags<[LinkerInput]>,
   HelpText<"Pass -z <arg> to the linker">, MetaVarName<"<arg>">,
   Group<Link_Group>;
 def offload_link : Flag<["--", "-"], "offload-link">, Group<Link_Group>,
@@ -855,8 +855,8 @@ def autocomplete : Joined<["--"], "autocomplete=">;
 def bind__at__load : Flag<["-"], "bind_at_load">;
 def bundle__loader : Separate<["-"], "bundle_loader">;
 def bundle : Flag<["-"], "bundle">;
-def b : JoinedOrSeparate<["-"], "b">, Flags<[LinkerInput, RenderAsInput]>,
-  HelpText<"Pass -b <arg> to the linker on AIX (only).">, MetaVarName<"<arg>">,
+def b : JoinedOrSeparate<["-"], "b">, Flags<[LinkerInput]>,
+  HelpText<"Pass -b <arg> to the linker on AIX">, MetaVarName<"<arg>">,
   Group<Link_Group>;
 // OpenCL-only Options
 def cl_opt_disable : Flag<["-"], "cl-opt-disable">, Group<opencl_Group>, Flags<[CC1Option]>,
@@ -4065,7 +4065,7 @@ def nostdincxx : Flag<["-"], "nostdinc++">, Flags<[CC1Option]>,
 def nostdlib : Flag<["-"], "nostdlib">, Group<Link_Group>;
 def nostdlibxx : Flag<["-"], "nostdlib++">;
 def object : Flag<["-"], "object">;
-def o : JoinedOrSeparate<["-"], "o">, Flags<[NoXarchOption, RenderAsInput,
+def o : JoinedOrSeparate<["-"], "o">, Flags<[NoXarchOption,
   CC1Option, CC1AsOption, FC1Option, FlangOption]>,
   HelpText<"Write output to <file>">, MetaVarName<"<file>">,
   MarshallingInfoString<FrontendOpts<"OutputFile">>;