ART: Fix "unused parameters"

GCC 4.8 decides that parameters for functions implemented with
"= default" are unused. This currently only impacts x86, but remove
the parameter names anyways.

Change-Id: I01865faa81af68c4c0e0b1cb1fb19e88ef548769
diff --git a/cmdline/cmdline_parse_result.h b/cmdline/cmdline_parse_result.h
index d6ac341..717642f 100644
--- a/cmdline/cmdline_parse_result.h
+++ b/cmdline/cmdline_parse_result.h
@@ -117,9 +117,9 @@
   }
 
   // Make sure copying is allowed
-  CmdlineParseResult(const CmdlineParseResult& other) = default;
+  CmdlineParseResult(const CmdlineParseResult&) = default;
   // Make sure moving is cheap
-  CmdlineParseResult(CmdlineParseResult&& other) = default;
+  CmdlineParseResult(CmdlineParseResult&&) = default;
 
  private:
   explicit CmdlineParseResult(const T& value)