[clang] [clang] Enable descriptions for --print-supported-extensions (PR #66715)

[David Spickett via cfe-commits]

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@@ -1016,7 +1017,8 @@ TEST(TargetParserTest, ARMPrintSupportedExtensions) {
 
   outs().flush();
   testing::internal::CaptureStdout();
-  ARM::PrintSupportedExtensions();
+  std::map<StringRef, StringRef> EmptyMap;
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DavidSpickett wrote:

Yeah that's fine. All it should check is that there's no path where a lookup (successful or not) causes an exception.

https://github.com/llvm/llvm-project/pull/66715