[Support] Forward GenCrashDiag argument from report_fatal_error(Error, bool)

[asb]

Summary

The boolean GenCrashDiag argument was previous just discarded, which seems to be an oversight that existed when this overload was first added.

Reviewers added based on those who last touched this function. I don't think there's an easy way to test this, but let me know if I'm wrong on that point.

[JDevlieghere]

Makes sense to me. LGTM.

llvm/lib/Support/Error.cpp

 
 void report_fatal_error(Error Err, bool GenCrashDiag) {
   assert(Err && "report_fatal_error called with success value");
   std::string ErrMsg;
   {
     raw_string_ostream ErrStream(ErrMsg);
     logAllUnhandledErrors(std::move(Err), ErrStream);
   }
-  report_fatal_error(Twine(ErrMsg));
+  report_fatal_error(Twine(ErrMsg), GenCrashDiag);
 }
 
 } // end namespace llvm
 
 LLVMErrorTypeId LLVMGetErrorTypeId(LLVMErrorRef Err) {
   return reinterpret_cast<ErrorInfoBase *>(Err)->dynamicClassID();
 }