Add unused attribute where necessary to quiet GCC 6 warnings.

gold/
	PR 19751
	* arm.cc (Reloc_stub::Key::name): Add unused attribute.
	* dirsearch.cc (Dir_caches::~Dir_caches): Likewise.

gold/ChangeLog

@@ -1,3 +1,9 @@
+2016-03-08  Cary Coutant  <ccoutant@gmail.com>
+
+        PR 19751
+        * arm.cc (Reloc_stub::Key::name): Add unused attribute.
+        * dirsearch.cc (Dir_caches::~Dir_caches): Likewise.
+
 2016-03-08  Cary Coutant  <ccoutant@gmail.com>
             Vladimir Radosavljevic  <vladimir.radosavljevic@imgtec.com>
 

gold/arm.cc

@@ -597,7 +597,7 @@ class Reloc_stub : public Stub
 
     // Name of key.  This is mainly for debugging.
     std::string
-    name() const;
+    name() const ATTRIBUTE_UNUSED;
 
    private:
     // Stub type.

gold/dirsearch.cc

@@ -102,7 +102,7 @@ class Dir_caches
     : lock_(), caches_()
   { }
 
-  ~Dir_caches();
+  ~Dir_caches() ATTRIBUTE_UNUSED;
 
   // Add a cache for a directory.
   void add(const char*);