Add a fixit for -Wobjc-protocol-property-synthesis

rdar://32132756

Differential Revision: https://reviews.llvm.org/D34886

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@307014 91177308-0d34-0410-b5e6-96231b3b80d8
(cherry picked from commit b9181e93ed98cd03533ebb9fa135ce59f5d9e46a)
8 files changed