meta-ingrasys: zaius: set BBFILE_PATTERN

Bitbake uses this regex to associate recipes and bbappends from BBFILES
(which contains recipes and bbappends from -all- layers listed in
bblayers.conf) to this layer.  The association is then used to map the
BBFILE_PRIORITY value for this layer onto the recipes provided by this
layer.

BBFILE_PRIORITY is used to determine which recipe to use when the same
recipe appears in multiple layers.

Without BBFILE_PATTERN set, recipes in this layer will get a default
priority and not the priority specified in BBFILE_PRIORITY.

This layer doesn't set a priority anyway, so functionally this patch is
a noop but it is an improvement from a correctness standpoint, and it
makes a warning go away.

Signed-off-by: Patrick Venture <venture@google.com>
Change-Id: I61905c10dc76ec0fc759254021fd1723d9b6c4ac
diff --git a/meta-zaius/conf/layer.conf b/meta-zaius/conf/layer.conf
index 174f7ef..5131c34 100644
--- a/meta-zaius/conf/layer.conf
+++ b/meta-zaius/conf/layer.conf
@@ -6,5 +6,5 @@
             ${LAYERDIR}/recipes-*/*/*.bbappend"
 
 BBFILE_COLLECTIONS += "zaius"
-BBFILE_PATTERN_zaius = ""
+BBFILE_PATTERN_zaius := "^${LAYERDIR}/"
 LAYERSERIES_COMPAT_zaius = "thud warrior"