cr50: use empty rollback map when building debug images
cr50: use empty rollback map when building debug images

Debug images should run on any H1 device, no matter what its INFO mask
is set to. This is achieved by emptying the info {} section of the
manifest when building images with nonempty CR50_DEV in the
environment.

BRANCH=cr50
BUG=b:35774863

TEST=built images with and without CR50_DEV=1, verified that the
     manifest has the info{} section emptied when CR50_DEV is set.
     Verified that the RW images boot fine.

Change-Id: Ied314c175d5c02f4108b7af85c244b6da8547616
Signed-off-by: Vadim Bendebury <5515d6d2d0829cbe0dd0dcf2094aaded06d58514@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/450904
Reviewed-by: Marius Schilder <d423f2980be0298efdef7df239b147d21d472f26@chromium.org>
Reviewed-by: Mary Ruthven <81380f3403fed74252e92df3ed012a1819ec6296@chromium.org>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec