phosphor-software-manager: Disable building tests

We don't yet use ptest so we are wasting cycles building tests

Change-Id: Id215020d9133806f98fa2253618e708ecb70f3d9
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/meta-phosphor/recipes-phosphor/flash/phosphor-software-manager_git.bb b/meta-phosphor/recipes-phosphor/flash/phosphor-software-manager_git.bb
index 4fa2aa4..19e5f31 100644
--- a/meta-phosphor/recipes-phosphor/flash/phosphor-software-manager_git.bb
+++ b/meta-phosphor/recipes-phosphor/flash/phosphor-software-manager_git.bb
@@ -84,6 +84,8 @@
 
 S = "${WORKDIR}/git"
 
+EXTRA_OEMESON = "-Dtests=disabled"
+
 do_install_append() {
     install -d ${D}/usr/local
 }