GlobPattern.h - remove unnecessary BitVector.h/StringRef.h includes. NFC

Use forward declarations (BitVector already had one) and an headers to source file that were implicitly using them.

llvm/include/llvm/Support/GlobPattern.h

@@ -14,16 +14,16 @@
 #ifndef LLVM_SUPPORT_GLOB_PATTERN_H
 #define LLVM_SUPPORT_GLOB_PATTERN_H
 
-#include "llvm/ADT/BitVector.h"
 #include "llvm/ADT/Optional.h"
-#include "llvm/ADT/StringRef.h"
 #include "llvm/Support/Error.h"
 #include <vector>
 
 // This class represents a glob pattern. Supported metacharacters
 // are "*", "?", "\", "[<chars>]", "[^<chars>]", and "[!<chars>]".
 namespace llvm {
+
 class BitVector;
+class StringRef;
 template <typename T> class ArrayRef;
 
 class GlobPattern {

llvm/lib/Support/GlobPattern.cpp

@@ -12,6 +12,7 @@
 
 #include "llvm/Support/GlobPattern.h"
 #include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/BitVector.h"
 #include "llvm/ADT/Optional.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/Support/Errc.h"

llvm/tools/llvm-objcopy/CopyConfig.cpp

@@ -7,7 +7,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "CopyConfig.h"
-
+#include "llvm/ADT/BitVector.h"
 #include "llvm/ADT/Optional.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringRef.h"

llvm/unittests/Support/GlobPatternTest.cpp

@@ -7,6 +7,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/Support/GlobPattern.h"
+#include "llvm/ADT/BitVector.h"
 #include "gtest/gtest.h"
 
 using namespace llvm;