Fix compilation on newer gcc by adding () instead of using prescendence.

src/hashmap.cc

 // Copyright 2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 111 matching lines @@
     if (q->key == NULL) {
       break;
     }
 
     // Find the initial position for the entry at position q.
     Entry* r = map_ + (q->hash & (capacity_ - 1));
 
     // If the entry at position q has its initial position outside the range
     // between p and q it can be moved forward to position p and will still be
     // found. There is now a new candidate entry for clearing.
-    if (q > p && (r <= p || r > q) ||
-        q < p && (r <= p && r > q)) {
+    if ((q > p && (r <= p || r > q)) ||
+        (q < p && (r <= p && r > q))) {
       *p = *q;
       p = q;
     }
   }
 
   // Clear the entry which is allowed to en emptied.
   p->key = NULL;
   occupancy_--;
 }
 
@@ skipping 68 matching lines @@
       n--;
     }
   }
 
   // Delete old map.
   allocator_->Delete(map);
 }
 
 
 } }  // namespace v8::internal