Previously any error in enum definition body stopped parsing it. With this
change parser tries to recover from errors.
The patch fixes PR10982.

Differential Revision: http://llvm-reviews.chandlerc.com/D2018


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@198259 91177308-0d34-0410-b5e6-96231b3b80d8