Adds a qtdbusextended recipe for the upcoming qtmpris recipe

recipes-nemomobile/qtdbusextended/qtdbusextended_git.bb

+SUMMARY = "Extended DBus for Qt"
+HOMEPAGE = "https://github.com/nemomobile/qtdbusextended"
+LICENSE = "LGPL-2.1"
+LIC_FILES_CHKSUM = "file://COPYING;md5=9851ce31b8dbc090eecd6cec46a8bf62"
+
+SRC_URI = "git://github.com/nemomobile/qtdbusextended.git;protocol=https"
+SRCREV = "34971431233dc408553245001148d34a09836df1"
+PR = "r1"
+PV = "+git${SRCREV}"
+S = "${WORKDIR}/git"
+inherit qmake5
+
+DEPENDS += "qtbase"
+RDEPENDS_${PN} += "qtbase"
+
+FILES_${PN}-dev += "/usr/lib/mkspecs"