`--listCmd:on` no longer works

[alaviss]

Example

# empty file

Actual Output

$ nim c -f --listCmd:on test.nim
........................................................
Hint: gc: orc; opt: none (DEBUG BUILD, `-d: release` generates faster code);  14922 lines; 0.428s; 23.086MiB peakmem; proj: test.nim; out: test [SuccessX]

Expected Output

........................................................
Hint: gc: orc; opt: none (DEBUG BUILD, `-d: release` generates faster code);  14922 lines; 0.428s; 23.086MiB peakmem; proj: test.nim; out: test [SuccessX]
<gcc invocations here>