When list-initializing an object of class type, if we pick an initializer list
constructor (and pass it an implicitly-generated std::initializer_list object),
be sure to mark the resulting construction as list-initialization. This fixes
an assert in template instantiation where we previously thought we'd got direct
non-list initialization without any parentheses.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@213201 91177308-0d34-0410-b5e6-96231b3b80d8