__arm64__ and __aarch64__ #ifdef adjustments

Change by Paul Osmialowski

See http://reviews.llvm.org/D4379 for details.

llvm-svn: 212583
diff --git a/lldb/source/Interpreter/CommandInterpreter.cpp b/lldb/source/Interpreter/CommandInterpreter.cpp
index 959b90f..59b779f 100644
--- a/lldb/source/Interpreter/CommandInterpreter.cpp
+++ b/lldb/source/Interpreter/CommandInterpreter.cpp
@@ -327,7 +327,7 @@
     if (cmd_obj_sp)
     {
         alias_arguments_vector_sp.reset (new OptionArgVector);
-#if defined (__arm__) || defined (__arm64__)
+#if defined (__arm__) || defined (__arm64__) || defined (__aarch64__)
         ProcessAliasOptionsArgs (cmd_obj_sp, "--", alias_arguments_vector_sp);
 #else
         ProcessAliasOptionsArgs (cmd_obj_sp, "--shell=" LLDB_DEFAULT_SHELL " --", alias_arguments_vector_sp);