Per [dcl.meaning]p1, a name in an inline namespace can be redeclared using a

name from the enclosing namespace set if the name is specified as a
qualified-id.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@196464 91177308-0d34-0410-b5e6-96231b3b80d8