docs: try to give move precise commands in Xcode-Ninja Hybrid section
docs: try to give move precise commands in Xcode-Ninja Hybrid section

In the name of making it easier for new-comers and people not very
familiar with UNIX command line, this patch tries to direct them more
explicitly, giving the exact commands they need to run in their preferred
terminal emulators.

Hopefully this should avoid more users having issues like the one posted here ->
https://groups.google.com/a/chromium.org/d/topic/chromium-dev/LbPKQARErmM/discussion

BUG=None
TEST=visually inspected the result in http://dillinger.io/.
R=sdefresne@chromium.org

Review URL: https://codereview.chromium.org/1753543003

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#378772}

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