kde-base: set a more common default SRC_URI

Signed-off-by: Andreas Müller <schnitzeltony@googlemail.com>

classes/kde-base.bbclass

@@ -1,9 +1,6 @@
 DEPENDS += "qtbase extra-cmake-modules-native"
 
-KDE_BRANCH ?= "master"
-
-# default git
-SRC_URI = "git://anongit.kde.org/${BPN};protocol=git;branch=${KDE_BRANCH}"
+SRC_URI = "http://download.kde.org/stable/${BPN}/${PV}/src/${BPN}-${PV}.tar.xz"
 
 # extra-cmake-modules cause dependent to check for python
 inherit cmake_qt5 cmake-extra-sanity pythonnative