AIX posix_madvise implementation.

sysdeps/unix/sysv/aix/posix_madvise.c

@@ -0,0 +1,8 @@
+#include <errno.h>
+#include <sys/mman.h>
+
+int
+posix_madvise (void *addr, size_t len, int advise)
+{
+  return madvise (addr, len, advise) ? errno : 0;
+}