Log message for all commands

The first time you bootstrap, all the build modules and apm are
installed. Previously this was showing no output so it was unclear
whether things are hung or now.

This will also help easily identify which stage of the build
npm and node-gyp errors are occurring.
:memo: Add git req to linux build instructions

Pretty simple, but doesn't come on a clean install.
Merge pull request #2602 from joliv/patch-1

Add git req to linux build instructions
Always pass windows build until flaky specs pass
Remove unused variable
Zip built app on Windows