logs getting spammed with "Precompiling" messages

[vtjnash]

These message were not supposed to appear in logs, since they are devoid of any useful information when not running interactive and aggressively overwhelm the real logs. This seems to be a regression since v1.11

Precompiling Order2 finished.
  1 dependency successfully precompiled in 1 seconds
Precompiling Order3 finished.
  1 dependency successfully precompiled in 1 seconds
Precompiling ModDocstring finished.
  1 dependency successfully precompiled in 1 seconds
Precompiling ModDocstring2 finished.
  1 dependency successfully precompiled in 1 seconds

[KristofferC]

Not release blocking.