ninja: Add .a files in a deterministic order to link lines.
ninja: Add .a files in a deterministic order to link lines.

The order even happens to match the one Xcode chooses.

BUG=280718
R=scottmg@chromium.org

Review URL: https://codereview.chromium.org/23439003
old8xp/gyp_from_google,old8xp/gyp_from_google,old8xp/gyp_from_google,old8xp/gyp_from_google,old8xp/gyp_from_google