Fix typo: objc_no_direct_instance_variable_assignmemt => objc_no_direct_instance_variable_assignment.

Fixes <rdar://problem/12927551>.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170971 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed