chore: Update the mold linker to 1.2 from 1.1 (#12970)

* Update the mold linker to 1.2 from 1.1

The mold project has steadily worked toward their goal of linking chromium in 1
second. We benefit from this work too.

Signed-off-by: Brian L. Troutwine <brian@troutwine.us>

* Update other mold instances

Signed-off-by: Brian L. Troutwine <brian@troutwine.us>