utils/genrandconfig: test per-package directories

Now that the support for per-package directories has been merged, it
is time to get some exposure for it in the autobuilders, so let's
build 1 out of 15 builds with this feature enabled, at least as an
initial step.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

utils/genrandconfig

@@ -341,6 +341,10 @@ def gen_config(args):
     # Allow hosts with old certificates to download over https
     configlines.append("BR2_WGET=\"wget --passive-ftp -nd -t 3 --no-check-certificate\"\n")
 
+    # Per-package folder
+    if randint(0, 15) == 0:
+        configlines.append("BR2_PER_PACKAGE_DIRECTORIES=y\n")
+
     # Amend the configuration with a few things.
     if randint(0, 20) == 0:
         configlines.append("BR2_ENABLE_DEBUG=y\n")