Fix LLDB build

Author: jansvoboda11

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

@@ -720,7 +720,7 @@ ClangExpressionParser::ClangExpressionParser(
   m_compiler = std::make_unique<CompilerInstance>();
 
   // Make sure clang uses the same VFS as LLDB.
-  m_compiler->createVirtualFileSystem(
+  m_compiler->setVirtualFileSystem(
       FileSystem::Instance().GetVirtualFileSystem());
   m_compiler->createFileManager();
 

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

@@ -746,7 +746,8 @@ ClangModulesDeclVendor::Create(Target &target) {
   auto instance = std::make_unique<clang::CompilerInstance>(invocation);
 
   // Make sure clang uses the same VFS as LLDB.
-  instance->createFileManager(FileSystem::Instance().GetVirtualFileSystem());
+  instance->setVirtualFileSystem(FileSystem::Instance().GetVirtualFileSystem());
+  instance->createFileManager();
   instance->setDiagnostics(diagnostics_engine);
 
   std::unique_ptr<clang::FrontendAction> action(new clang::SyntaxOnlyAction);