Revert "squisher: removed"

This reverts commit f4b5b9de33ca98d6debd596bc8f1d7a846cafe35.
Revert "Follow "bacon: get rid of squisher""

This reverts commit e220339b1431c2455d2af1e2df1809e5f9f1bf22.

Conflicts:
	releasetools/opticharger
	releasetools/squisher