Update GN build files with the cpu_arch -> current_cpu change.
Update GN build files with the cpu_arch -> current_cpu change.

R=machenbach@chromium.org, jochen@chromium.org
BUG=crbug.com/344767
LOG=Y

Review URL: https://codereview.chromium.org/946023002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#26804}

UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh