Fix MSVC "32-bit shift implicitly converted to 64 bits" warning. NFCI.

llvm-svn: 362927
diff --git a/llvm/tools/llvm-objcopy/MachO/MachOWriter.cpp b/llvm/tools/llvm-objcopy/MachO/MachOWriter.cpp
index 5c72400..f0c0aee 100644
--- a/llvm/tools/llvm-objcopy/MachO/MachOWriter.cpp
+++ b/llvm/tools/llvm-objcopy/MachO/MachOWriter.cpp
@@ -462,7 +462,7 @@
     for (auto &Sec : LC.Sections) {
       if (!Sec.isVirtualSection()) {
         auto FilePaddingSize =
-            OffsetToAlignment(FileOffsetInSegment, 1 << Sec.Align);
+            OffsetToAlignment(FileOffsetInSegment, 1ull << Sec.Align);
         Sec.Offset = Offset + FileOffsetInSegment + FilePaddingSize;
         Sec.Size = Sec.Content.size();
         FileOffsetInSegment += FilePaddingSize + Sec.Size;