[DebugInfo] Fix some Clang-tidy modernize and Include What You Use warnings; other minor fixes (NFC).

llvm-svn: 296413
diff --git a/llvm/lib/DebugInfo/DWARF/DWARFAcceleratorTable.cpp b/llvm/lib/DebugInfo/DWARF/DWARFAcceleratorTable.cpp
index 2eac2cd..85e1eae 100644
--- a/llvm/lib/DebugInfo/DWARF/DWARFAcceleratorTable.cpp
+++ b/llvm/lib/DebugInfo/DWARF/DWARFAcceleratorTable.cpp
@@ -1,4 +1,4 @@
-//===--- DWARFAcceleratorTable.cpp ----------------------------------------===//
+//===- DWARFAcceleratorTable.cpp ------------------------------------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -7,12 +7,19 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "llvm/ADT/SmallVector.h"
 #include "llvm/DebugInfo/DWARF/DWARFAcceleratorTable.h"
+#include "llvm/DebugInfo/DWARF/DWARFFormValue.h"
+#include "llvm/DebugInfo/DWARF/DWARFRelocMap.h"
 #include "llvm/Support/Dwarf.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Support/Format.h"
 #include "llvm/Support/raw_ostream.h"
+#include <cstddef>
+#include <cstdint>
+#include <utility>
 
-namespace llvm {
+using namespace llvm;
 
 bool DWARFAcceleratorTable::extract() {
   uint32_t Offset = 0;
@@ -131,4 +138,3 @@
     }
   }
 }
-}