This changes the behavior of AlwaysBreakAfterDeclarationReturnType
so that it supports breaking after declarations, definitions, or
both.

Differential Revision: http://reviews.llvm.org/D10370
Reviewed By: Daniel Jasper

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@256046 91177308-0d34-0410-b5e6-96231b3b80d8