distro: Add guf-wayland-no-gplv3.conf

Previously it was found under meta-seconorth-distro however better fints
in this layer.

conf/distro/guf-wayland-no-gplv3.conf

+require conf/distro/guf-wayland.conf
+
+# Remove support for GPLv3
+DISTRO_FEATURES_remove = "gplv3"
+
+INCOMPATIBLE_LICENSE = "GPL-3.0 LGPL-3.0 AGPL-3.0"
+
+# Adapt for Kirkstone to INCOMPATIBLE_LICENSE_EXCEPTIONS ?
+WHITELIST_LGPL-3.0 = " \
+    gdb \
+"
+
+WHITELIST_GPL-3.0 = " \
+    readline \
+    binutils \
+    gdb \
+    qmlbench \
+"
+
+PACKAGE_EXCLUDE = " \
+    ${WHITELIST_LGPL-3.0} \
+    ${WHITELIST_GPL-3.0} \
+"
+

[Tobias Kahlki]

@clemens.terasa Can you add a comment, that explains more in detail, what's happening here?