[U-Boot] [PATCH 03/15] sandbox: Add a way to write data to the host filesystem

[sjg at google.com]

For debugging it is sometimes useful to write out data for inspection
using an external tool. Add a function which can write this data to a
given file.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

 arch/sandbox/cpu/os.c | 20 ++++++++++++++++++++
 include/os.h          | 13 +++++++++++++
 2 files changed, 33 insertions(+)

Applied to u-boot-dm