[clang-cl] Accept the --warning-suppression-mappings= option (#133092)

Author: zmodem

clang/include/clang/Driver/Options.td

@@ -877,7 +877,7 @@ def Wa_COMMA : CommaJoined<["-"], "Wa,">,
 def warning_suppression_mappings_EQ : Joined<["--"],
   "warning-suppression-mappings=">, Group<Diag_Group>,
   HelpText<"File containing diagnostic suppression mappings. See user manual "
-  "for file format.">, Visibility<[ClangOption, CC1Option]>;
+  "for file format.">, Visibility<[ClangOption, CLOption, CC1Option]>;
 def Wall : Flag<["-"], "Wall">, Group<W_Group>, Flags<[HelpHidden]>,
   Visibility<[ClangOption, CC1Option, FlangOption]>;
 def WCL4 : Flag<["-"], "WCL4">, Group<W_Group>, Flags<[HelpHidden]>,

clang/test/Driver/cl-options.c

@@ -746,6 +746,7 @@
 // RUN:     -fwrapv-pointer \
 // RUN:     -fno-wrapv-pointer \
 // RUN:     --version \
+// RUN:     --warning-suppression-mappings=foo \
 // RUN:     -Werror /Zs -- %s 2>&1
 
 // Accept clang options under the /clang: flag.