Add toybox-tests to TEST_MAPPING

Bug: 148007808
Change-Id: I2e4d8b3c10198c9b8a8f587da9849a79b101132f
Signed-off-by: Alistair Delva <adelva@google.com>

TEST_MAPPING

diff --git a/TEST_MAPPING b/TEST_MAPPING
index 4342bde..2de9710 100644
--- a/TEST_MAPPING
+++ b/TEST_MAPPING
@@ -42,6 +42,9 @@
     },
     {
       "name": "minikin_tests"
+    },
+    {
+      "name": "toybox-tests"
     }
   ]
 }