reproducibility: move known non-repro list to layer.conf

The current include file that stores the known non-reproducible packages
is layer dependent and that forces the user of the layers to maintain
the list of the files (for example, see AB config[0]).

By moving the exclude list to each layer.conf and extending the common
OEQA_REPRODUCIBLE_EXCLUDED_PACKAGES variable, the known non-reproducible
packages will be automatically excluded for each layer used in the
reproducibility test without any special knowledge in the test
environment.

NB: the empty list for meta-initramfs was just removed not moved.

[0]: https://git.yoctoproject.org/yocto-autobuilder-helper/tree/config.json?id=7d8933e75bdf7fb821a25617cb2dcabf1f3f8700#n322

Suggested-by: Quentin Schulz <quentin.schulz@cherry.de>
Co-Developed-by: Guillaume Swaenepoel <guillaume.swaenepoel@smile.fr>
Signed-off-by: Guillaume Swaenepoel <guillaume.swaenepoel@smile.fr>
Signed-off-by: Yoann Congal <yoann.congal@smile.fr>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-gnome/conf/include/non-repro-meta-gnome.inc

@@ -1,13 +0,0 @@
-# List of known non-reproducible package of the meta-gnome layer
-# Please keep this list sorted
-KNOWN_NON_REPRO_META_GNOME = " \
-    geary \
-    geary-dbg \
-    gegl-dev \
-    gimp \
-    gimp-dbg \
-    gnome-terminal-src \
-    grilo-src \
-    gtk-vnc-src \
-    ibus \
-"

meta-gnome/conf/layer.conf

@@ -29,3 +29,17 @@ BBFILES_DYNAMIC += " \
     virtualization-layer:${LAYERDIR}/dynamic-layers/meta-virtualization/*/*/*.bbappend \
     security:${LAYERDIR}/dynamic-layers/meta-security/*/*/*.bb \
 "
+
+# List of known non-reproducible package of the meta-gnome layer
+# Please keep this list sorted
+OEQA_REPRODUCIBLE_EXCLUDED_PACKAGES += " \
+    geary \
+    geary-dbg \
+    gegl-dev \
+    gimp \
+    gimp-dbg \
+    gnome-terminal-src \
+    grilo-src \
+    gtk-vnc-src \
+    ibus \
+"