Renaming SwapByteOrder() to getSwappedBytes()

The next commit will add swapByteOrder(), acting in-place

llvm-svn: 210973
diff --git a/llvm/lib/MC/ELFObjectWriter.cpp b/llvm/lib/MC/ELFObjectWriter.cpp
index 0a54627..0a17c33 100644
--- a/llvm/lib/MC/ELFObjectWriter.cpp
+++ b/llvm/lib/MC/ELFObjectWriter.cpp
@@ -1179,7 +1179,7 @@
   if (Size <= Magic.size() + sizeof(Size) + CompressedContents.size())
     return false;
   if (sys::IsLittleEndianHost)
-    Size = sys::SwapByteOrder(Size);
+    Size = sys::getSwappedBytes(Size);
   CompressedContents.insert(CompressedContents.begin(),
                             Magic.size() + sizeof(Size), 0);
   std::copy(Magic.begin(), Magic.end(), CompressedContents.begin());