Use create methods since msvc doesn't handle delegating constructors.

llvm-svn: 209076
diff --git a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
index 478103f..fe5d572 100644
--- a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
+++ b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
@@ -2004,8 +2004,8 @@
         return Error(InvalidTypeForValue);
 
       auto *NewGA =
-          new GlobalAlias(PTy->getElementType(), PTy->getAddressSpace(),
-                          GetDecodedLinkage(Record[2]), "", TheModule);
+          GlobalAlias::create(PTy->getElementType(), PTy->getAddressSpace(),
+                              GetDecodedLinkage(Record[2]), "", TheModule);
       // Old bitcode files didn't have visibility field.
       // Local linkage must have default visibility.
       if (Record.size() > 3 && !NewGA->hasLocalLinkage())