Bug 1453610 - Add a '*&' to a self-assignment to silent a -Wself-assign warning r=froydnj

MozReview-Commit-ID: 64ZMlMV9YR8

--HG--
extra : rebase_source : d672bc6ecb363821a160f16039e28fdcccc2f4ff

xpcom/tests/gtest/TestTArray.cpp

@@ -136,7 +136,7 @@ TEST(TArray, AssignmentOperatorSelfAssignment)
   nsTArray<int> array;
   array = DummyArray();
 
-  array = array;
+  array = *&array;
   ASSERT_EQ(DummyArray(), array);
   array = Move(array);
   ASSERT_EQ(DummyArray(), array);