add triviality tests back

Author: wusatosi

tests/beman/inplace_vector/CMakeLists.txt

@@ -34,7 +34,7 @@ endfunction()
 
 # Tests for official specs
 add_gtest(container_requirements)
-# add_gtest(triviality)
+add_gtest(triviality)
 # add_gtest(compare)
 # add_gtest(constructors)
 # add_gtest(size_n_data)