MFC r243572:

MFC r243572:

  Pull in r168610 from upstream libc++:

    When using libc++ headers on FreeBSD, in combination with -std=c++98,
    -ansi or -std=c++03, the long long type is not supported.  So in this
    case, several functions and types, like lldiv_t, strtoll(), are not
    declared.

  This should make it possible to use the libc++ headers in c++98 mode.

  Note: libc++ is originally designed as a c++0x or higher library, so you
  should still take care when using it with c++98 or c++03.

  Noted by:	Yamaya Takashi <yamayan@kbh.biglobe.ne.jp>

MFC r243673 (by theraven):

  Merge new libc++ into head.

git-svn-id: svn://svn.freebsd.org/base/stable/9@244436 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f