[clang][unittests] Fix a leak in SearchPathTest (#139335)

Author: ian-twilightcoder

clang/unittests/Frontend/SearchPathTest.cpp

@@ -51,6 +51,7 @@ class SearchPathTest : public ::testing::Test {
   FileManager FileMgr;
   SourceManager SourceMgr;
   std::unique_ptr<CompilerInvocation> Invocation;
+  IntrusiveRefCntPtr<TargetInfo> Target;
 
   void addDirectories(ArrayRef<StringRef> Dirs) {
     for (StringRef Dir : Dirs) {
@@ -65,10 +66,9 @@ class SearchPathTest : public ::testing::Test {
     CompilerInvocation::CreateFromArgs(*Invocation, Args, Diags);
     HeaderSearchOptions HSOpts = Invocation->getHeaderSearchOpts();
     LangOptions LangOpts = Invocation->getLangOpts();
-    TargetInfo *Target =
-        TargetInfo::CreateTargetInfo(Diags, Invocation->getTargetOpts());
+    Target = TargetInfo::CreateTargetInfo(Diags, Invocation->getTargetOpts());
     auto HeaderInfo = std::make_unique<HeaderSearch>(HSOpts, SourceMgr, Diags,
-                                                     LangOpts, Target);
+                                                     LangOpts, Target.get());
     ApplyHeaderSearchOptions(*HeaderInfo, HSOpts, LangOpts,
                              Target->getTriple());
     return HeaderInfo;