Add etc to hwasan-postsubmit

Test: Run tests under HWASan.
Bug: 193568145
Change-Id: I0edc35a73fe6760ffe52127d246fde4fe3980bbc
diff --git a/rootdir/etc/TEST_MAPPING b/rootdir/etc/TEST_MAPPING
index e4d3d5e..1c7b716 100644
--- a/rootdir/etc/TEST_MAPPING
+++ b/rootdir/etc/TEST_MAPPING
@@ -3,5 +3,10 @@
     {
       "name": "CtsBionicTestCases"
     }
+  ],
+  "hwasan-postsubmit": [
+    {
+      "name": "CtsBionicTestCases"
+    }
   ]
 }