[llvm] [LLVM][PDB][Test] Fix the build (PR #131984)

[Hans Wennborg via llvm-commits]

https://github.com/zmodem approved this pull request.

lgtm, thanks!

> Build: https://lab.llvm.org/buildbot/#/builders/145/builds/5745

For convenience, this was the problem:

```
25.251 [2/4/1218] Building CXX object unittests/DebugInfo/PDB/CMakeFiles/DebugInfoPDBTests.dir/PDBVariantTest.cpp.o
FAILED: unittests/DebugInfo/PDB/CMakeFiles/DebugInfoPDBTests.dir/PDBVariantTest.cpp.o 
ccache /home/buildbots/llvm-external-buildbots/clang.19.1.7/bin/clang++ --gcc-toolchain=/gcc-toolchain/usr -DGTEST_HAS_RTTI=0 -DLLVM_BUILD_STATIC -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/build/unittests/DebugInfo/PDB -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/llvm/unittests/DebugInfo/PDB -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/build/include -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/llvm/include -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/third-party/unittest/googletest/include -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/third-party/unittest/googlemock/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -std=c++17  -Wno-variadic-macros -Wno-gnu-zero-variadic-macro-arguments -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -Wno-suggest-override -MD -MT unittests/DebugInfo/PDB/CMakeFiles/DebugInfoPDBTests.dir/PDBVariantTest.cpp.o -MF unittests/DebugInfo/PDB/CMakeFiles/DebugInfoPDBTests.dir/PDBVariantTest.cpp.o.d -o unittests/DebugInfo/PDB/CMakeFiles/DebugInfoPDBTests.dir/PDBVariantTest.cpp.o -c /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/llvm/unittests/DebugInfo/PDB/PDBVariantTest.cpp
/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/llvm/unittests/DebugInfo/PDB/PDBVariantTest.cpp:40:50: error: passing no argument for the '...' parameter of a variadic macro is a C++20 extension [-Werror,-Wc++20-extensions]
   40 | TYPED_TEST_SUITE(PDBVariantIntegerTest, TestTypes);
      |                                                  ^
/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/third-party/unittest/googletest/include/gtest/gtest-typed-test.h:191:9: note: macro 'TYPED_TEST_SUITE' defined here
  191 | #define TYPED_TEST_SUITE(CaseName, Types, ...)                          \
      |         ^
1 error generated.
```

https://github.com/llvm/llvm-project/pull/131984