options/posix: Define MADV_SEQUENTIAL and MADV_WILLNEED
// Linux extension:
#define MREMAP_MAYMOVE 1
#define MREMAP_FIXED 2
+
+#define MADV_SEQUENTIAL 2
+#define MADV_WILLNEED 3
#define MADV_DONTNEED 4
// Missing: posix_typed_mem_open(), POSIX_TYPED constants and related stuff.
