TableGen: Don't add synthetic Records to the RecordKeeper.
TableGen: Don't add synthetic Records to the RecordKeeper.

The RecordKeeper could be shared by multiple target instances, causing
duplicate record errors.

git-svn-id: a4a6f32337ebd29ad4763b423022f00f68d1c7b7@141080 91177308-0d34-0410-b5e6-96231b3b80d8

lodyagin/bare_cxx,lodyagin/bare_cxx,lodyagin/bare_cxx,lodyagin/bare_cxx,lodyagin/bare_cxx