Updating trunk VERSION from 3881.0 to 3882.0

# This is an automated release commit.
# Do not revert without consulting chrome-pmo@google.com.
NOAUTOREVERT=true
TBR=mmoss@chromium.org

Change-Id: I283469f6c2a42c10bf01fa64e54eeb3a9a09d03d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1750864Reviewed-by: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#686304}

chrome/VERSION

 MAJOR=78
 MINOR=0
-BUILD=3881
+BUILD=3882
 PATCH=0