Add some missing copyright headers.

Went through files that were modified by
  git ls-tree --name-only -r HEAD | git check-attr filter --stdin | \
  sed -Ene '/(copyright|uncrustify)$/ {s/:.*//;p;}' | \
  grep -v '_kernel_' | xargs admin/copyright.py --add-missing
and updated the copyright years for those where I know the history or
could easily dig it out.  Mostly this is CMake build system files, which
came to existence at earliest 2009, so it wasn't too hard to dig out
when the code was actually introduced/changed, using git log and
git log --follow.

Part of #818.

Change-Id: Ibba6d8bacc700efd76b7bc429228d751b8e17a27