memtest86+: Initial commit of 5.01 codebase

This is the initial commit of memtest86+

The tarball was downloaded from www.memtest.org on Feb 24,2016
and unpacked.  No changes have yet been made.
Version: Memtest86+ V5.01 (27/09/2013)

sha1sum of tarball:
eb4b6d70114db3c9ed320785da44c0ba8349c10c *memtest86+-5.01.tar.gz

Change-Id: I1ed925c85925ff5d98e61a11ad1dc6b3c44f79b7
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/13818
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
diff --git a/stddef.h b/stddef.h
new file mode 100644
index 0000000..213c89b
--- /dev/null
+++ b/stddef.h
@@ -0,0 +1,8 @@
+#ifndef I386_STDDEF_H
+#define I386_STDDEF_H
+
+#define NULL ((void *)0)
+
+typedef unsigned long size_t;
+
+#endif /* I386_STDDEF_H */