package/duktape: bump to version 2.7.0

Update hash of license file (update in year:
https://github.com/svaarala/duktape/commit/03d4d728f8365021de6955c649e6dcd05dcca99f

)

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>