[PATCH v2 3/5] binman: add tests for sign option

[Simon Glass]

Add the test which provides sequence of actions:
  1. create the image from binman dts
  2. create public and private keys
  3. add public key into dtb with fdt_add_pubkey
  4. 1. sign FIT container with new sign option with extracting from
        image
     2. sign exact FIT container with replacing of it in image
  5. check with fit_check_sign

Signed-off-by: Ivan Mikhaylov <fr0st61te at gmail.com>
---
 tools/binman/ftest.py              | 61 +++++++++++++++++++++++++++++
 tools/binman/test/277_fit_sign.dts | 63 ++++++++++++++++++++++++++++++
 2 files changed, 124 insertions(+)
 create mode 100644 tools/binman/test/277_fit_sign.dts

Applied to u-boot-dm/next, thanks!