[coreboot] #5: Add license header to all source files

[coreboot]

#5: Add license header to all source files
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    Reporter:  uwe                |         Owner:  uwe
        Type:  task               |        Status:  new
    Priority:  blocker            |     Milestone:  Resolve license issues
   Component:  coreboot           |    Resolution:
    Keywords:                     |  Dependencies:
Patch Status:  there is no patch  |
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Comment (by oxygene):

 One of our lint tests ("make lint") looks for proper license headers.

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Ticket URL: <https://tracker.coreboot.org/trac/coreboot/ticket/5#comment:8>
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