tests: Add instance-id tests

They weren't included on the patch introducing the API. Better late than
never!

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Change-Id: I36b38959f427f4abf9fb3308d6e301a2a692170f
diff --git a/tests/meson.build b/tests/meson.build
index aba89bc..c41d8d2 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -14,6 +14,7 @@
 
 
 tests = [
+  'instance-id',
   'libpldm_base_test',
   'libpldm_platform_test',
   'libpldm_bios_test',