Rename the 'Attributes' class to 'Attribute'. It's going to represent a single attribute in the future.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170502 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/VMCore/AttributesImpl.h b/lib/VMCore/AttributesImpl.h
index 193e873..7bc5c50 100644
--- a/lib/VMCore/AttributesImpl.h
+++ b/lib/VMCore/AttributesImpl.h
@@ -1,4 +1,4 @@
-//===-- AttributesImpl.h - Attributes Internals -----------------*- C++ -*-===//
+//===-- AttributesImpl.h - Attribute Internals -----------------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -28,7 +28,7 @@
   bool hasAttribute(uint64_t A) const;
 
   bool hasAttributes() const;
-  bool hasAttributes(const Attributes &A) const;
+  bool hasAttributes(const Attribute &A) const;
 
   uint64_t getAlignment() const;
   uint64_t getStackAlignment() const;