phosphor-logging: Disable building tests

We don't yet support ptest so we shouldn't be building all of the test
cases.

Change-Id: If567127f9990819e191de4d03aa9fba7ea889bd0
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/meta-phosphor/recipes-phosphor/logging/phosphor-logging_git.bb b/meta-phosphor/recipes-phosphor/logging/phosphor-logging_git.bb
index 982c071..9911eb0 100644
--- a/meta-phosphor/recipes-phosphor/logging/phosphor-logging_git.bb
+++ b/meta-phosphor/recipes-phosphor/logging/phosphor-logging_git.bb
@@ -68,6 +68,7 @@
         "
 
 EXTRA_OEMESON = " \
+        -Dtests=disabled \
         -Dyamldir=${STAGING_DIR_TARGET}${yaml_dir} \
         -Dcallout_yaml=${STAGING_DIR_NATIVE}${callouts_datadir}/callouts.yaml \
         "