move IdentifierTable.h from liblex to libbasic.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@42730 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Lex/HeaderSearch.cpp b/Lex/HeaderSearch.cpp
index 00a36ee..719b9fb 100644
--- a/Lex/HeaderSearch.cpp
+++ b/Lex/HeaderSearch.cpp
@@ -11,9 +11,9 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "clang/Basic/FileManager.h"
 #include "clang/Lex/HeaderSearch.h"
-#include "clang/Lex/IdentifierTable.h"
+#include "clang/Basic/FileManager.h"
+#include "clang/Basic/IdentifierTable.h"
 #include "llvm/System/Path.h"
 #include "llvm/ADT/SmallString.h"
 using namespace clang;