Add printing the LC_ENCRYPTION_INFO_64 load command with llvm-objdump’s -private-headers
and add tests for the two AArch64 binaries.

llvm-svn: 224400
diff --git a/llvm/lib/Object/MachOObjectFile.cpp b/llvm/lib/Object/MachOObjectFile.cpp
index 86b640f..0e96bc7 100644
--- a/llvm/lib/Object/MachOObjectFile.cpp
+++ b/llvm/lib/Object/MachOObjectFile.cpp
@@ -2304,6 +2304,11 @@
   return getStruct<MachO::encryption_info_command>(this, L.Ptr);
 }
 
+MachO::encryption_info_command_64
+MachOObjectFile::getEncryptionInfoCommand64(const LoadCommandInfo &L) const {
+  return getStruct<MachO::encryption_info_command_64>(this, L.Ptr);
+}
+
 
 MachO::any_relocation_info
 MachOObjectFile::getRelocation(DataRefImpl Rel) const {