Add options to inform shopfloor after factory reset

Add two options to inform shopfloor after factory reset. One can provide
board_factory_generate_finalize_post.sh to generate a message for
default sending flow or use board_factory_complete.sh for entirely customized
flow.

BUG=None
TEST=1. Edit lsb_factory to add shopfloor url
     2. Add board_factory_generate_finalize_post.sh to generate post
     content
     3. Do factory reset and sending data on jerry

CQ-DEPEND=CL:309704

Change-Id: I46d34e3434d396ddce02b7a00227e5c0b4dd47d6
Reviewed-on: https://chromium-review.googlesource.com/309715
Commit-Ready: Shun-Hsing Ou <shunhsingou@chromium.org>
Tested-by: Shun-Hsing Ou <shunhsingou@chromium.org>
Reviewed-by: Bowgo Tsai <bowgotsai@chromium.org>
1 file changed