u-boot: Fix prerm script

The prerm script didn't work.  It called the for() variable i, and then
used the for() variable 'file'.  Oops.

Signed-off-by: Sean Cross <xobs@kosagi.com>
debian: install: put files in /usr/share/

They should go into /usr/share/ rather than /usr/lib/.

Signed-off-by: Sean Cross <xobs@kosagi.com>
debian: Update changelog for -rc3

Signed-off-by: Sean Cross <xobs@kosagi.com>