Try to fix build errors on Android.

It doesn't like the implicit conversion from T[] to ArrayRef<T>
so I'm using `llvm::makeArrayRef()`.  Hopefully I got everything.

llvm-svn: 282195
diff --git a/lldb/source/Commands/CommandObjectExpression.cpp b/lldb/source/Commands/CommandObjectExpression.cpp
index b2b1ed3..4a041df 100644
--- a/lldb/source/Commands/CommandObjectExpression.cpp
+++ b/lldb/source/Commands/CommandObjectExpression.cpp
@@ -208,7 +208,7 @@
 
 llvm::ArrayRef<OptionDefinition>
 CommandObjectExpression::CommandOptions::GetDefinitions() {
-  return g_expression_options;
+  return llvm::makeArrayRef(g_expression_options);
 }
 
 CommandObjectExpression::CommandObjectExpression(