U-Boot/ONIE version string update

Remove the newline from the U-Boot version string so that the U-Boot
Version and ONIE version appear on a single line.

Moving from a two line version string:

  U-Boot 2013.01.01-ga855eb6 (Oct 07 2013 - 10:45:06)
  ONIE 2013.10-rc1

to a single line string:

  U-Boot 2013.01.01-ga855eb6 (Oct 07 2013 - 10:45:06) - ONIE 2013.10-rc1
Update 'ver' environment variablue during upgrades

When installing a new ONIE version make sure to update the 'ver'
environment variable.