ART: SHARED_REQUIRES to REQUIRES_SHARED

This coincides with the actual attribute name and upstream usage.
Preparation for deferring to libbase.

Test: m
Test: m test-art-host
Change-Id: Ia8986b5dfd926ba772bf00b0a35eaf83596d8518
diff --git a/runtime/gc/space/zygote_space.h b/runtime/gc/space/zygote_space.h
index f2889e2..4d10de8 100644
--- a/runtime/gc/space/zygote_space.h
+++ b/runtime/gc/space/zygote_space.h
@@ -33,7 +33,7 @@
   static ZygoteSpace* Create(const std::string& name, MemMap* mem_map,
                              accounting::ContinuousSpaceBitmap* live_bitmap,
                              accounting::ContinuousSpaceBitmap* mark_bitmap)
-      SHARED_REQUIRES(Locks::mutator_lock_);
+      REQUIRES_SHARED(Locks::mutator_lock_);
 
   void Dump(std::ostream& os) const;
 
@@ -77,7 +77,7 @@
   }
 
   void LogFragmentationAllocFailure(std::ostream& os, size_t failed_alloc_bytes) OVERRIDE
-      SHARED_REQUIRES(Locks::mutator_lock_);
+      REQUIRES_SHARED(Locks::mutator_lock_);
 
  protected:
   virtual accounting::ContinuousSpaceBitmap::SweepCallback* GetSweepCallback() {