revert r194655

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195285 91177308-0d34-0410-b5e6-96231b3b80d8
YAML I/O add support for validate()

MappingTrait template specializations can now have a validate() method which 
performs semantic checking. For details, see <http://llvm.org/docs/YamlIO.html>.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195286 91177308-0d34-0410-b5e6-96231b3b80d8
Constify the DIEs used for pubname and pubtype tables. Propagate
through findAttribute etc.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195290 91177308-0d34-0410-b5e6-96231b3b80d8
Update comment.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195293 91177308-0d34-0410-b5e6-96231b3b80d8