MFC r275366:
Pull in r209785 from upstream libc++ trunk (by Marshall Clow):
Fix a problem exposed by r208825, which caused bind (and other bits of
libc++) to stop working. And tests
This fix is needed to support clang 3.5.0 and higher, which are more
strict about forming pointer-to-function types with cv-qualifiers or
ref-qualifiers. See also the upstream PR <http://llvm.org/PR19742> and
<http://llvm.org/viewvc/llvm-project?rev=208825&view=rev>
Reported by: amdmi3
git-svn-id: svn://svn.freebsd.org/base/stable/10@275472
ccf9f872-aa2e-dd11-9fc8-
001c23d0bc1f