Add puffin to hwasan-postsubmit. am: 80be4157fe am: 0a3f6c2ad8 am: a0e156f06a

Original change: https://android-review.googlesource.com/c/platform/external/puffin/+/2029287

Change-Id: Ibd927d5dce4d0542450ffa5abfe9d8ecd69f0a1a
diff --git a/TEST_MAPPING b/TEST_MAPPING
index ee8f0ca..d78c7bd 100644
--- a/TEST_MAPPING
+++ b/TEST_MAPPING
@@ -3,5 +3,10 @@
     {
       "name": "puffin_unittest"
     }
+  ],
+  "hwasan-postsubmit": [
+    {
+      "name": "puffin_unittest"
+    }
   ]
 }