objC block layout: Patch reorders block layout to 
produce more inline layout metadata. // rdar://12752901


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172683 91177308-0d34-0410-b5e6-96231b3b80d8
Implement a fixit for -Wmain-return-type


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172684 91177308-0d34-0410-b5e6-96231b3b80d8