[arm] Share constant pool entries in snapshot.

src/heap/heap.cc

Index: src/heap/heap.cc
diff --git a/src/heap/heap.cc b/src/heap/heap.cc
index 4ef4c900b955b52ae03f425eda508d598785a9e6..306c39c7a20d32cb25f8506ba8f07dbcaba84852 100644
--- a/src/heap/heap.cc
+++ b/src/heap/heap.cc
@@ -2626,6 +2626,7 @@ void Heap::CreateFixedStubs() {
   // The eliminates the need for doing dictionary lookup in the
   // stub cache for these stubs.
   HandleScope scope(isolate());
+  CanonicalHandleScope canonical(isolate());
 
   // Create stubs that should be there, so we don't unexpectedly have to
   // create them if we need them during the creation of another stub.