MFS r254728:

MFS r254728:

  Pull in r182983 from upstream clang trunk:

    Fix handling of braced-init-list as reference initializer within
    aggregate initialization. Previously we would incorrectly require an
    extra set of braces around such initializers.

  Pull in r188718 from upstream clang trunk:

    Handle init lists and _Atomic fields.

    Fixes PR16931.

  These fixes are needed for the atomic_flag type to work correctly in our
  stdatomic.h.

Approved by:	re

git-svn-id: svn://svn.freebsd.org/base/releng/9.2@254786 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f