Delayed template parsing is not supported by the AST serialization system yet,...

Delayed template parsing is not supported by the AST serialization system yet, so turning it off.  This fixes a test breakage caused by r177336.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@177655 91177308-0d34-0410-b5e6-96231b3b80d8