Update git submodules

* Update docs/submodules/fuel from branch 'stable/euphrates'
  - Add license headers where missing
    
    While at it, compact 'set' into bash shebang where possible and
    add `make patches-copyright` target to simplify adding patch
    license headers.
    
    Change-Id: I0c841de72e5709e5eef915a52c5ec4a7fc0f7c37
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
    (cherry picked from commit 644e5fdfa2f49b988a5150e2a4eefc12daecd845)
    

1 files changed, 0 insertions, 0 deletions

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
-Subproject ef570e8954b44fd608cf1ff5e50b5cbc3d0d178
+Subproject 94825e25dcc5bf4a8490690fc1cf423df0e9d7f