Change group of command-line options to f_group since that does not suggest that the options are "clang only"

Author: Tarun Prabhu

clang/include/clang/Driver/Options.td

@@ -2001,10 +2001,10 @@ within a command line are combined with spaces; spaces and backslashes within an
 argument are escaped with backslashes. This format differs from the format of
 the equivalent section produced by GCC with the -frecord-gcc-switches flag.
 This option is currently only supported on ELF targets.}]>,
-  Group<f_clang_Group>,
+  Group<f_Group>,
   Visibility<[ClangOption, CLOption, DXCOption, FlangOption]>;
 def fno_record_command_line : Flag<["-"], "fno-record-command-line">,
-  Group<f_clang_Group>,
+  Group<f_Group>,
   Visibility<[ClangOption, CLOption, DXCOption, FlangOption]>;
 def : Flag<["-"], "frecord-gcc-switches">, Alias<frecord_command_line>;
 def : Flag<["-"], "fno-record-gcc-switches">, Alias<fno_record_command_line>;