gedit_2.30.0: Set `LICENSE` to GPLv2+ for real.

gedit_2.30.0: Set `LICENSE` to GPLv2+ for real.

Set

In commit 860f29 [1] `LICENSE` was just set to `GPLv2` instead of `GPLv2+` in contrary to the commit message and the intention.

Thanks for Andreas Oberritter to spotting this [2].

[1] http://cgit.openembedded.net/cgit.cgi/openembedded/commit/?h=master&id=860f2947b54a29becb4686261026c205bf3b9358
[2] http://lists.linuxtogo.org/pipermail/openembedded-devel/2010-October/025823.html

Signed-off-by: Paul Menzel <paulepanter@users.sourceforge.net>
Signed-off-by: Khem Raj <raj.khem@gmail.com>