Implement tests for NULL iterators for <array> re: N3644
Implement tests for NULL iterators for <array> re: N3644

git-svn-id: 273b07cebdae5845b4a75aae04570b978db9eb50@187809 91177308-0d34-0410-b5e6-96231b3b80d8

lodyagin/bare_cxx,lodyagin/bare_cxx,lodyagin/bare_cxx,lodyagin/bare_cxx,lodyagin/bare_cxx