Add Roboto fonts and update Noto fonts in install-chromeos-fonts.py.
Add Roboto fonts and update Noto fonts in install-chromeos-fonts.py.

notofonts: 20150706
robotofonts: 20150625

BUG=none

Review URL: https://codereview.chromium.org/1449563004

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#359769}

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