Split the testing class into two.

syzygy/pe/unittest_util.cc

Index: syzygy/pe/unittest_util.cc
diff --git a/syzygy/pe/unittest_util.cc b/syzygy/pe/unittest_util.cc
index b7cb8fdba90d67a35fe5f10056fcb5f70bde20b5..34840a4a54e263a977a8774577a234c424811779 100644
--- a/syzygy/pe/unittest_util.cc
+++ b/syzygy/pe/unittest_util.cc
@@ -160,6 +160,9 @@ const wchar_t testing::kIntegrationTestsDllName[] =
 const wchar_t testing::kIntegrationTestsDllPdbName[] =
     L"integration_tests_dll.dll.pdb";
 
+const wchar_t testing::kIntegrationTestsClangDllName[] =
+    L"integration_tests_clang_dll.dll";
+
 const wchar_t kNoExportsDllName[] = L"no_exports_dll.dll";
 const wchar_t kNoExportsDllPdbName[] = L"no_exports_dll.dll.pdb";