[lldb][unittests] Add more test cases to CPlusPlusNameParser unit-tests

[Michael137]

Summary

Add test cases for the possible function qualifiers that the
CPlusPlusNameParser supports.

[Michael137]

• Rebase

[aprantl]

More tests are always welcome!

lldb/unittests/Language/CPlusPlus/CPlusPlusLanguageTest.cpp

TestCase test_cases[] = {
        "llvm", "countTrailingOnes<unsigned int>",
        "(unsigned int, llvm::ZeroBehavior)", "",
        "llvm::countTrailingOnes<unsigned int>"},
       {"std::enable_if<(10u)<(64), bool>::type llvm::isUInt<10u>(unsigned "
        "long)",
        "llvm", "isUInt<10u>", "(unsigned long)", "", "llvm::isUInt<10u>"},
       {"f<A<operator<(X,Y)::Subclass>, sizeof(B)<sizeof(C)>()", "",
        "f<A<operator<(X,Y)::Subclass>, sizeof(B)<sizeof(C)>", "()", "",
-       "f<A<operator<(X,Y)::Subclass>, sizeof(B)<sizeof(C)>"}};
+       "f<A<operator<(X,Y)::Subclass>, sizeof(B)<sizeof(C)>"},
+      {"llvm::Optional<llvm::MCFixupKind>::operator*() const volatile &&",
+       "llvm::Optional<llvm::MCFixupKind>", "operator*", "()", "const volatile &&",
+       "llvm::Optional<llvm::MCFixupKind>::operator*"}};
 
   for (const auto &test : test_cases) {
     CPlusPlusLanguage::MethodName method(ConstString(test.input));
     EXPECT_TRUE(method.IsValid()) << test.input;
     if (method.IsValid()) {
       EXPECT_EQ(test.context, method.GetContext().str());
       EXPECT_EQ(test.basename, method.GetBasename().str());
       EXPECT_EQ(test.arguments, method.GetArguments().str());