renameat2: port to non-renameat platforms Problem reported for MSVC-2015 by Gisle Vanem in: http://lists.gnu.org/archive/html/bug-gnulib/2017-08/msg00001.html * lib/renameat2.c [!HAVE_RENAMEAT]: Include <sys/stat.h> here too. (renameat2) [!HAVE_RENAMEAT]: Fix typo in arg passing.