Move remaining methods inside the Attributes class. Merge the 'Attribute' namespaces.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164631 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Bitcode/Reader/BitcodeReader.cpp b/lib/Bitcode/Reader/BitcodeReader.cpp
index 2b2c36b..b69a362 100644
--- a/lib/Bitcode/Reader/BitcodeReader.cpp
+++ b/lib/Bitcode/Reader/BitcodeReader.cpp
@@ -477,7 +477,7 @@
 
       for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
         Attributes ReconstitutedAttr =
-          Attribute::decodeLLVMAttributesForBitcode(Record[i+1]);
+          Attributes::decodeLLVMAttributesForBitcode(Record[i+1]);
         Record[i+1] = ReconstitutedAttr.Raw();
       }