Don't store time & content for folders when updating repos.
Don't store time & content for folders when updating repos.

This is very redundant, and leads to trying to write the data back
to the folder after the update has happened, which isn't a valid
thing to be doing (and emitted warnings).

Change-Id: Iecb9383464863cf6f1b9ced09f7ff602f5c3281d

jmorse/cyanide,jmorse/cyanide,jmorse/cyanide,jmorse/cyanide