Imported using git-ubuntu import.
Changelog parent: 96da636da0810a1f65d850bf5178aca3e6e32535
New changelog entries:
* change armel+imx51 back to the proper metapackage name
* enable universe for armel+dove build
* drop armel fallback, we want to fail officially if no armel subarch is set
* clean some trailing whitespace in the armel subarch case statement
