phosphor-logging: set config flag

Set config flag 'enable-metadata-processing', to indicate that error
metadata handlers should be compiled.

Change-Id: Ica7cd6bdfcf6cb88c672a504593f20a5fddb7ca4
Signed-off-by: Deepak Kodihalli <dkodihal@in.ibm.com>
diff --git a/meta-phosphor/common/recipes-phosphor/logging/phosphor-logging.bb b/meta-phosphor/common/recipes-phosphor/logging/phosphor-logging.bb
index 9c5dd46..677b94a 100644
--- a/meta-phosphor/common/recipes-phosphor/logging/phosphor-logging.bb
+++ b/meta-phosphor/common/recipes-phosphor/logging/phosphor-logging.bb
@@ -31,9 +31,13 @@
 
 S = "${WORKDIR}/git"
 
+PACKAGECONFIG ??= "metadata-processing"
+PACKAGECONFIG[metadata-processing] = " \
+        --enable-metadata-processing, \
+        --disable-metadata-processing, , \
+        "
+
 EXTRA_OECONF = " \
         YAML_DIR=${STAGING_DIR_NATIVE}${yaml_dir} \
         CALLOUTS_YAML=${STAGING_DIR_NATIVE}${callouts_datadir}/callouts.yaml \
         "
-
-TARGET_CXXFLAGS += "-DPROCESS_META"