Switch default VM layout to "2gb-rootfs-updatable".

We now have VM tests that need more space. We were increasing the
layout in cbuildbot, but it seems better to change the default so that
everyone is more likely to do the same thing.

TEST=Local build + PreCQ.

Change-Id: I3ce97fadc5859f6fb09af0228b739ea53a4be8a1
Reviewed-by: Mike Frysinger <>
Tested-by: Don Garrett <>
Reviewed-by: Chris Sosa <>
Commit-Queue: Don Garrett <>
1 file changed