meta-gnome: add Cogl/Clutter from oe-core

Nothing in openembedded-core needs Clutter now, and Clutter is abandoned
upstream.  Move it to meta-gnome as there are still a few users of
Clutter in Gnome.

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-gnome/classes/clutter.bbclass

@@ -0,0 +1,18 @@
+def get_minor_dir(v):
+    import re
+    m = re.match(r"^([0-9]+)\.([0-9]+)", v)
+    return "%s.%s" % (m.group(1), m.group(2))
+
+def get_real_name(n):
+    import re
+    m = re.match(r"^([a-z]+(-[a-z]+)?)(-[0-9]+\.[0-9]+)?", n)
+    return "%s" % (m.group(1))
+
+VERMINOR = "${@get_minor_dir("${PV}")}"
+REALNAME = "${@get_real_name("${BPN}")}"
+
+SRC_URI = "${GNOME_MIRROR}/${REALNAME}/${VERMINOR}/${REALNAME}-${PV}.tar.xz;name=archive"
+S = "${WORKDIR}/${REALNAME}-${PV}"
+
+CLUTTERBASEBUILDCLASS ??= "autotools"
+inherit ${CLUTTERBASEBUILDCLASS} pkgconfig gtk-doc gettext