When parsing data layout string looking for endianness, use the correct default

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@197771 91177308-0d34-0410-b5e6-96231b3b80d8

lib/IR/Module.cpp

@@ -63,7 +63,7 @@ Module::~Module() {
 /// Target endian information.
 Module::Endianness Module::getEndianness() const {
   StringRef temp = DataLayout;
-  Module::Endianness ret = AnyEndianness;
+  Module::Endianness ret = BigEndian;
 
   while (!temp.empty()) {
     std::pair<StringRef, StringRef> P = getToken(temp, "-");