[Refactor] Moving SourceExtraction header from lib to include

[SureYeaah]

Summary

• Moved the SourceExtraction header from lib to include so that it can be used in clangd refactorings.

[SureYeaah]

Added endif comment

[arphaman]

LGTM

clang/include/clang/Tooling/Refactoring/Extract/SourceExtraction.h

 //===--- SourceExtraction.cpp - Clang refactoring library -----------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_CLANG_LIB_TOOLING_REFACTORING_EXTRACT_SOURCE_EXTRACTION_H
-#define LLVM_CLANG_LIB_TOOLING_REFACTORING_EXTRACT_SOURCE_EXTRACTION_H
+#ifndef LLVM_CLANG_TOOLING_REFACTORING_EXTRACT_SOURCE_EXTRACTION_H
+#define LLVM_CLANG_TOOLING_REFACTORING_EXTRACT_SOURCE_EXTRACTION_H
 
 #include "clang/Basic/LLVM.h"
 
 namespace clang {
 
 class LangOptions;
 class SourceManager;
 class SourceRange;

clang/lib/Tooling/Refactoring/Extract/Extract.cpp

 //===--- Extract.cpp - Clang refactoring library --------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
 /// Implements the "extract" refactoring that can pull code into
 /// new functions, methods or declare new variables.
 ///
 //===----------------------------------------------------------------------===//
 
 #include "clang/Tooling/Refactoring/Extract/Extract.h"
-#include "SourceExtraction.h"
 #include "clang/AST/ASTContext.h"
 #include "clang/AST/DeclCXX.h"
 #include "clang/AST/Expr.h"
 #include "clang/AST/ExprObjC.h"
 #include "clang/Rewrite/Core/Rewriter.h"
+#include "clang/Tooling/Refactoring/Extract/SourceExtraction.h"
 
 namespace clang {
 namespace tooling {
 
 namespace {
 
 /// Returns true if \c E is a simple literal or a reference expression that
 /// should not be extracted.

clang/lib/Tooling/Refactoring/Extract/SourceExtraction.cpp

 //===--- SourceExtraction.cpp - Clang refactoring library -----------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 
-#include "SourceExtraction.h"
+#include "clang/Tooling/Refactoring/Extract/SourceExtraction.h"
 #include "clang/AST/Stmt.h"
 #include "clang/AST/StmtCXX.h"
 #include "clang/AST/StmtObjC.h"
 #include "clang/Basic/SourceManager.h"
 #include "clang/Lex/Lexer.h"
 
 using namespace clang;