Add libbase to hwasan-postsubmit am: 2d235ac982 am: b6d0b8b6ae am: ded8c26383

Original change: https://android-review.googlesource.com/c/platform/system/libbase/+/2032269

Change-Id: I0535e9f188bc9180148c6a31734a9d29e4c8a057
diff --git a/TEST_MAPPING b/TEST_MAPPING
index 3659bee..a3b2bfc 100644
--- a/TEST_MAPPING
+++ b/TEST_MAPPING
@@ -3,5 +3,10 @@
     {
       "name": "libbase_test"
     }
+  ],
+  "hwasan-postsubmit": [
+    {
+      "name": "libbase_test"
+    }
   ]
 }