python: bump PR of packages after update of distutils.bbclass

* Bump every recipe inheriting distutils or setuptools and
  not overriding do_install without calling distutils_do_install.

Signed-off-by: Andreas Oberritter <obi@opendreambox.org>

meta-oe/recipes-devtools/python/python-lxml_2.2.8.bb

@@ -4,7 +4,7 @@ HOMEPAGE = "http://codespeak.net/lxml"
 LICENSE = "BSD"
 LIC_FILES_CHKSUM = "file://LICENSES.txt;md5=7de92baeb3b7bfaebe72404155fdb346"
 SRCNAME = "lxml"
-PR = "r1"
+PR = "r2"
 
 DEPENDS = "libxml2 libxslt"
 RDEPENDS_${PN} += "libxml2 libxslt python-compression"