Go with 'install' tool rather than using 'cp'.
Go with 'install' tool rather than using 'cp'.

Makes code more robust and puts it in sync with how we do elsewhere
(perf and monitoring).

BUG=skia:3083
R=jcgregorio@google.com

Review URL: https://codereview.chromium.org/722473002

Tiger66639/skia-buildbot,google/skia-buildbot,Tiger66639/skia-buildbot,google/skia-buildbot,Tiger66639/skia-buildbot,google/skia-buildbot,Tiger66639/skia-buildbot,Tiger66639/skia-buildbot,Tiger66639/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,Tiger66639/skia-buildbot,google/skia-buildbot