estream: Change license from GPL to LPGL.
* common/estream-printf.c, common/estream-printf.h: Change license. * common/estream.c, common/estream.h: Ditto.
g10 Code is the sole copyright holder of Libestream and thus as CEO I
have the rights to to change the license. This copy here in GnuPG is
currently the most current one thus the change is recorded in this
repository. This change is also deemed valid for all older versions.
- Signed-off-by: Werner Koch <wk@gnupg.org>