[PATCH 4/6] binman: Use bytearray instead of string

[Simon Glass]

This is faster if data is being concatenated. Update the section and
collection etypes.

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

 tools/binman/etype/collection.py | 2 +-
 tools/binman/etype/section.py    | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

Applied to u-boot-dm, thanks!