[code coverage] import jinja2 from third_party

An user reported that running coverage_test.py fails due to missing
jinja2, this CL fixes the problem by importing it from third_party/.

Bug: 941573
Change-Id: I1efdd45424668fcd46b091eccde484fdf81ecaa8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1521795
Reviewed-by: Max Moroz <mmoroz@chromium.org>
Commit-Queue: Max Moroz <mmoroz@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#640853}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 84017e9fb7df521970fe534c75ac1926392c1ce6
1 file changed