Change pair::swap(pair&) to call ADL swap instead of iter_swap; this fixes an obscure bug having to do with overloaded operator&. Fixes PR#24890
Change pair::swap(pair&) to call ADL swap instead of iter_swap; this fixes an obscure bug having to do with overloaded operator&. Fixes PR#24890

git-svn-id: 756ef344af921d95d562d9e9f9389127a89a6314@248304 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/libcxx,llvm-mirror/libcxx,llvm-mirror/libcxx,llvm-mirror/libcxx,llvm-mirror/libcxx