Add gclient sync to build section
Add gclient sync to build section

Bug: None
Change-Id: I4fa7bf3f8f5f7cb898e68e8a640341eb6fbe466e
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/4000842
Commit-Queue: Simon Zünd <38944668e9e2ca98ccd0275b53370f90fa55c113@chromium.org>
Reviewed-by: Benedikt Meurer <024a1e0af501338d11c3b837c6193d11c140d792@chromium.org>
Reviewed-by: Thiago Perrotta <660c40383373240e945f6beab69fd6841cb4aa33@chromium.org>
Reviewed-by: Simon Zünd <38944668e9e2ca98ccd0275b53370f90fa55c113@chromium.org>

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