[LLDB] Fix build after TargetInfo::adjust signature change (#147727)

Fixes buildbot failure on lldb-x86_64-debian due to
#146620

https://lab.llvm.org/buildbot/#/builders/162/builds/26414

Update LLDB calls to TargetInfo::adjust() to use the new 3-parameter
signature introduced in beea2a9. Pass
nullptr for AuxTarget since LLDB doesn't use auxiliary targets in these
contexts.

Author: yxsamliu

lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionParser.cpp

@@ -831,7 +831,7 @@ ClangExpressionParser::ClangExpressionParser(
   // FIXME: We shouldn't need to do this, the target should be immutable once
   // created. This complexity should be lifted elsewhere.
   m_compiler->getTarget().adjust(m_compiler->getDiagnostics(),
-                                 m_compiler->getLangOpts());
+                                 m_compiler->getLangOpts(), /*AuxTarget=*/nullptr);
 
   // 5. Set up the diagnostic buffer for reporting errors
   auto diag_mgr = new ClangDiagnosticManagerAdapter(

lldb/source/Plugins/ExpressionParser/Clang/ClangModulesDeclVendor.cpp

@@ -757,7 +757,7 @@ ClangModulesDeclVendor::Create(Target &target) {
   if (!instance->hasTarget())
     return nullptr;
 
-  instance->getTarget().adjust(*diagnostics_engine, instance->getLangOpts());
+  instance->getTarget().adjust(*diagnostics_engine, instance->getLangOpts(), /*AuxTarget=*/nullptr);
 
   if (!action->BeginSourceFile(*instance,
                                instance->getFrontendOpts().Inputs[0]))