devtool/copy_buildsystem: adds meta-skeleton layer in the eSDK installation.

The eSDK installation requires the meta-skeleton layer.
The build system might use the meta-skeleton recipes as layout
to create custom recipes. An example is the recipetool script
that uses the meta-skeleton kernel recipe when creating a custom
kernel recipe.

[YOCTO #11102]

(From OE-Core rev: 5c9ef0734d23909b5694ed43cdbb205c2ba9ca95)

Signed-off-by: Juan M Cruz Alcaraz <juan.m.cruz.alcaraz@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oe/copy_buildsystem.py

@@ -32,6 +32,10 @@ class BuildSystem(object):
 
         corebase = os.path.abspath(self.d.getVar('COREBASE'))
         layers.append(corebase)
+        # The bitbake build system uses the meta-skeleton layer as a layout
+        # for common recipies, e.g: the recipetool script to create kernel recipies
+        # Add the meta-skeleton layer to be included as part of the eSDK installation
+        layers.append(os.path.join(corebase, 'meta-skeleton'))
 
         # Exclude layers
         for layer_exclude in self.layers_exclude:
@@ -128,6 +132,14 @@ class BuildSystem(object):
                         line = line.replace('workspacelayer', workspace_newname)
                         f.write(line)
 
+        # meta-skeleton layer is added as part of the build system
+        # but not as a layer included in the build, therefore it is
+        # not reported to the function caller.
+        for layer in layers_copied:
+            if layer.endswith('/meta-skeleton'):
+                layers_copied.remove(layer)
+                break
+
         return layers_copied
 
 def generate_locked_sigs(sigfile, d):