C++11 status:
 * Mark 'sequence points' as done now we have a warning for unsequenced operations
 * Mark 'memory model' as done now we correctly model bitfield operations


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@173771 91177308-0d34-0410-b5e6-96231b3b80d8