Add new configuration keyword "RehashBl"

This feature is needed in case an image is updated at later stage
after bootimage has been created.

How to use:
  Add keyword "RehashBl" to configuration file, for example, update.cfg:
    RehashBl;

  Invoke cbootimage to re-calculate bootloader aes hash, for example, for
  bootimage bootloader.bin:
    $ cbootimage -s tegra210 --update update.cfg bootloader.bin bootloader.bin-resigned

  Where bootloader.bin-resigned is the resigned bootimage bootloader.bin

Signed-off-by: Jimmy Zhang <jimmzhang@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/samples/update.cfg b/samples/update.cfg
new file mode 100644
index 0000000..c5c741b
--- /dev/null
+++ b/samples/update.cfg
@@ -0,0 +1 @@
+RehashBl;