Linefeeds are wrong when output is redirected to file

[cmatsuoka]

When sending the output of a craft-cli application to a file we should translate CRs to LFs (and possibly remove the line padding), otherwise we end up with something like Line 1 [padding] ^M Line 2 [padding] ^M Line3 [padding].

This is the real output of snapcraft redirected to a file:

Launching instance...
Initializing parts lifecycle                                                   ^MInstalling package repositories...                                             Executing parts lifecycle...                                                   ^MInstalled package repositories
^MExecuting parts lifecycle: skip pull figlet (already ran)                      ^MExecuted: skip pull figlet (already ran)                                       Executing parts lifecycle: skip overlay figlet (already ran)
^MExecuted: skip overlay figlet (already ran)
Executing parts lifecycle: skip build figlet (already ran)                     ^MExecuted: skip build figlet (already ran)
Executing parts lifecycle: skip stage figlet (already ran)                     ^MExecuted: skip stage figlet (already ran)                                      Executing parts lifecycle: skip prime figlet (already ran)
^MExecuted: skip prime figlet (already ran)
Executed parts lifecycle
Generating snap metadata...                                                    ^MGenerated snap metadata
Creating snap package...