liblp: add test to presubmit

Add liblp_test to TEST_MAPPING to be triggered as TH presubmit test.

Bug: none
Test: liblp_test
Change-Id: If4d60e816e4e1b321603e1a5ed00e21297567d38
Signed-off-by: Alessio Balsini <balsini@google.com>
diff --git a/fs_mgr/TEST_MAPPING b/fs_mgr/TEST_MAPPING
index a947b4e..de38ff6 100644
--- a/fs_mgr/TEST_MAPPING
+++ b/fs_mgr/TEST_MAPPING
@@ -2,6 +2,9 @@
   "presubmit": [
     {
       "name": "libdm_test"
+    },
+    {
+      "name": "liblp_test"
     }
   ]
 }