[PATCH 6/8] membuf: Add some tests

[Simon Glass]

Add tests for the membuf implementation.

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

 test/lib/Makefile |   1 +
 test/lib/membuf.c | 239 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 240 insertions(+)
 create mode 100644 test/lib/membuf.c

Applied to sjg/master, thanks!