I
think that typically, you'd want to ask questions such as
this
one your PMC, and/or your assigned mentor, and/or the
EAC.
In this case, I believe that the answer is simple:
No generated source code bears any _expression_ of
creativity
or art whatsoever, and is therefore not subject to Copyright
law.
Therefore, just leave the source as it is (without any
copyright
header), and check it in.
If there is any copyrightable material in the generated code,
then it's the template from which it was generated.
Therefore,
that very template is responsible for adding a copyright
header
or not.
Also, note that the absence or presence of a Copyright
Header
does not change the legal status of any material in any way
--
its copyright owner, or license information exist or do not
exist
regardless of whether that information is in the source file or
not.
Having it in the source file is just a matter of making it easier
for
adopters to find the relevant information.
I've copied the very same answer to bugzilla. Additional
discussions
on bugzilla please.