Add missing headers to adapt llvmorg-11-init-5501-g213aea4c583 and llvmorg-11-init-5528-gd7c5037e6b9

Author: MaskRay

src/clang_tu.cc

@@ -8,6 +8,7 @@
 
 #include <clang/AST/Type.h>
 #include <clang/Lex/Lexer.h>
+#include <llvm/Support/Host.h>
 #include <llvm/Support/Path.h>
 
 using namespace clang;

src/indexer.cc

@@ -10,6 +10,7 @@
 #include "sema_manager.hh"
 
 #include <clang/AST/AST.h>
+#include <clang/Basic/TargetInfo.h>
 #include <clang/Frontend/FrontendAction.h>
 #include <clang/Index/IndexDataConsumer.h>
 #include <clang/Index/IndexingAction.h>

src/sema_manager.cc

@@ -9,6 +9,7 @@
 #include "pipeline.hh"
 #include "platform.hh"
 
+#include <clang/Basic/TargetInfo.h>
 #include <clang/Lex/PreprocessorOptions.h>
 #include <clang/Sema/CodeCompleteConsumer.h>
 #include <clang/Sema/Sema.h>