[CLATJ#2] libclat: Add libclat_test to postsubmit

Add native library libclat test to postsubmit.

Bug: 212345928
Test: atest libclat_test
Change-Id: Ied5e0796b01c384b3eee2d40c0c735859709be33
diff --git a/TEST_MAPPING b/TEST_MAPPING
index 6996ad9..9f2ea35 100644
--- a/TEST_MAPPING
+++ b/TEST_MAPPING
@@ -32,6 +32,9 @@
     // TODO: move to presubmit when known green.
     {
       "name": "bpf_existence_test"
+    },
+    {
+      "name": "libclat_test"
     }
   ],
   "mainline-presubmit": [