Reinit varasm if we have to zero flag_strict_aliasing because unsafe is imported.
Reinit varasm if we have to zero flag_strict_aliasing because
unsafe is imported.

R=iant
https://golang.org/cl/2063041

anlhord/gofrontend,qskycolor/gofrontend,golang/gofrontend,anlhord/gofrontend,qskycolor/gofrontend,golang/gofrontend,anlhord/gofrontend,anlhord/gofrontend,anlhord/gofrontend,qskycolor/gofrontend,qskycolor/gofrontend,anlhord/gofrontend,qskycolor/gofrontend,golang/gofrontend,anlhord/gofrontend,qskycolor/gofrontend,golang/gofrontend,qskycolor/gofrontend