Make install-build-deps more obvious in docs

When following the linux build instructions, it's easy to miss the
instruction to run install-build-deps.sh, because the instruction is
just inside a paragraph of prose. All the other steps you're supposed
to run are broken out into their own copy-paste-able code blocks.

This change adds a code block for install-build-deps, so it's harder
to miss.

Change-Id: I96ba8bb38ab82ec79d4c96cd50fbaffa85184ba3
Reviewed-on: https://chromium-review.googlesource.com/c/1399451
Reviewed-by: Jeff Carpenter <jeffcarp@chromium.org>
Commit-Queue: Aaron Gable <agable@chromium.org>
Cr-Commit-Position: refs/heads/master@{#621871}
1 file changed