[CodeGen][ObjC] Fix assertion failure in EmitARCStoreStrongCall.

The assertion fails because EmitValueForIvarAtOffset doesn't get the
correct type of the ivar when the class the ivar belongs to is
parameterized. This commit fixes the function to compute the ivar's type
based on the type argument provided to the parameterized class.


Differential Revision: https://reviews.llvm.org/D33698

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@304449 91177308-0d34-0410-b5e6-96231b3b80d8
(cherry picked from commit da3da60ded94f0ac960e711e96d96abdb7465a1f)
2 files changed