Destroy arrays and ARC fields when throwing out of ctors.

Previously we were only handling non-array fields of class type.

Testcases derived from a patch by WenHan Gu.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@174146 91177308-0d34-0410-b5e6-96231b3b80d8