[clang] Fix -Wsubobject-linkage after D117262

/home/buildbot/llvm-avr-linux/llvm-avr-linux/llvm/clang/lib/CodeGen/Address.h:76:7: warning: 'clang::CodeGen::Address' has a field 'clang::CodeGen::Address::A' whose type uses the anonymous namespace [-Wsubobject-linkage]

https://lab.llvm.org/buildbot/#/builders/112/builds/12047

clang/lib/CodeGen/Address.h

@@ -22,7 +22,6 @@
 namespace clang {
 namespace CodeGen {
 
-namespace {
 // We try to save some space by using 6 bits over two PointerIntPairs to store
 // the alignment. However, some arches don't support 3 bits in a PointerIntPair
 // so we fallback to storing the alignment separately.
@@ -70,7 +69,6 @@ public:
     return CharUnits::fromQuantity(1UL << AlignLog);
   }
 };
-} // namespace
 
 /// An aligned address.
 class Address {