Revert failing test cases

Author: arsenm

clang-tools-extra/clang-tidy/tool/ClangTidyMain.cpp

@@ -22,6 +22,7 @@
 #include "llvm/ADT/StringSet.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/InitLLVM.h"
+#include "llvm/Support/PluginLoader.h"
 #include "llvm/Support/Process.h"
 #include "llvm/Support/Signals.h"
 #include "llvm/Support/TargetSelect.h"

lld/tools/lld/lld.cpp

@@ -35,6 +35,7 @@
 #include "llvm/Support/CrashRecoveryContext.h"
 #include "llvm/Support/LLVMDriver.h"
 #include "llvm/Support/Path.h"
+#include "llvm/Support/PluginLoader.h"
 #include "llvm/Support/Process.h"
 #include "llvm/TargetParser/Host.h"
 #include "llvm/TargetParser/Triple.h"