test: add callout-test

Add test program which can create callouts based on an input device
path. It creates an error, with callouts, with name TestCallout.

Change-Id: I96b66b73ae4a9c00daff06222841a13747c07408
Signed-off-by: Deepak Kodihalli <dkodihal@in.ibm.com>
diff --git a/tools/example/xyz/openbmc_project/Example/Device.metadata.yaml b/tools/example/xyz/openbmc_project/Example/Device.metadata.yaml
new file mode 100644
index 0000000..e5d6508
--- /dev/null
+++ b/tools/example/xyz/openbmc_project/Example/Device.metadata.yaml
@@ -0,0 +1,7 @@
+- name: Callout
+  meta:
+    - str: "CALLOUT_ERRNO_TEST=%d"
+      type: int32
+    - str: "CALLOUT_DEVICE_PATH_TEST=%s"
+      type: string
+      process: true