add packagegroup for demo

Signed-off-by: Priouzeau Christophe <christophe.priouzeau@st.com>

recipes-st/packagegroups/packagegroup-st-demo.bb

@@ -0,0 +1,10 @@
+DESCRIPTION = "List of package to install on Userfs (with potential dependency)"
+
+LICENSE = "MIT"
+LIC_FILES_CHKSUM = "file://${COREBASE}/meta/files/common-licenses/MIT;md5=0835ade698e0bcf8506ecda2f7b4f302"
+
+inherit packagegroup
+
+RDEPENDS_${PN} = "\
+    "
+