trunks: update the libchrome version to 307740

BUG=None
TEST=Build the world
CQ-DEPEND=CL:234450

Change-Id: I4163d40eb35a0916cf669397b8c5056e58adc2cb
Reviewed-on: https://chromium-review.googlesource.com/234700
Tested-by: Alex Vakulenko <avakulenko@chromium.org>
Reviewed-by: Alex Deymo <deymo@chromium.org>
Commit-Queue: Alex Vakulenko <avakulenko@chromium.org>
1 file changed