Handle PredefinedExpr with templates and lambdas

Summary:

- lambdas, blocks or captured statements in templates were not
  handled which causes codegen crashes.

Differential Revision: http://llvm-reviews.chandlerc.com/D1628



git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@190784 91177308-0d34-0410-b5e6-96231b3b80d8