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.errors.yaml b/tools/example/xyz/openbmc_project/Example/Device.errors.yaml
new file mode 100644
index 0000000..fbcf78c
--- /dev/null
+++ b/tools/example/xyz/openbmc_project/Example/Device.errors.yaml
@@ -0,0 +1,2 @@
+- name: Callout
+  description: Generic device callout