bonnie: Update LICENSE field version to GPLv2
bonnie: Update LICENSE field version to GPLv2

* Updated LICENSE field version from generic GPL to GPLv2 to
  reflect the real license version.
* This change was back-ported from oe-core.
* Bump the PR

Signed-off-by: Chase Maupin <5a5662f468a76e0fc4391e65fb9f536df44d7380@ti.com>
Signed-off-by: Martin Jansa <516df3ff67e1fa5d153800b15fb204c0a1a389dc@gmail.com>

openembedded/openembedded,xifengchuo/openembedded,giobauermeister/openembedded,xifengchuo/openembedded,giobauermeister/openembedded,openembedded/openembedded,giobauermeister/openembedded,hulifox008/openembedded,hulifox008/openembedded,giobauermeister/openembedded,giobauermeister/openembedded,openembedded/openembedded,giobauermeister/openembedded,xifengchuo/openembedded,xifengchuo/openembedded,xifengchuo/openembedded,openembedded/openembedded,giobauermeister/openembedded,openembedded/openembedded,giobauermeister/openembedded,openembedded/openembedded,xifengchuo/openembedded,xifengchuo/openembedded,openembedded/openembedded,hulifox008/openembedded,openembedded/openembedded,hulifox008/openembedded,xifengchuo/openembedded,xifengchuo/openembedded,openembedded/openembedded,hulifox008/openembedded,hulifox008/openembedded,openembedded/openembedded,hulifox008/openembedded,giobauermeister/openembedded,openembedded/openembedded