Read/write in PCH Sema's StdNamespace and StdBadAlloc and use a LazyDeclPtr for them that will deserialize them when needed.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@110031 91177308-0d34-0410-b5e6-96231b3b80d8
12 files changed