Fix the build broken in r177239

Seems some accidental C++11 crept in there. Reported by the C++98 buildbots.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177241 91177308-0d34-0410-b5e6-96231b3b80d8

Author: dwblaikie

lib/IR/DIBuilder.cpp

@@ -117,7 +117,7 @@ void DIBuilder::createCompileUnit(unsigned Lang, StringRef Filename,
 /// for a file.
 DIFile DIBuilder::createFile(StringRef Filename, StringRef Directory) {
   assert(!Filename.empty() && "Unable to create file without name");
-  Value *Pair[] {
+  Value *Pair[] = {
     MDString::get(VMContext, Filename),
     MDString::get(VMContext, Directory),
   };