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

recipes/bonnie/bonnie++.inc

@@ -3,8 +3,9 @@
 # Released under the MIT license (see packages/COPYING)
 
 DESCRIPTION="Tests large file IO and creation/deletion of small files."
-LICENSE="GPL"
+LICENSE="GPLv2"
 
+PR = "r1"
 
 SRC_URI="http://www.coker.com.au/bonnie++/${BPN}-${PV}.tgz \
 	 file://gcc-4.3-fixes.patch"