[bots] Run vm unit tests using qemu as well as FFI tests.

Cq-Include-Trybots: luci.dart.try:vm-precomp-ffi-qemu-linux-release-arm-try
Change-Id: I3c104ce5594d8f427fdf247364e6952a45132820
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/204786
Reviewed-by: Martin Kustermann <[email protected]>
Commit-Queue: Tess Strickland <[email protected]>

Author: sstrickl

tools/bots/test_matrix.json

@@ -1266,7 +1266,7 @@
         "vm-precomp-ffi-qemu-linux-release-arm"
       ],
       "meta": {
-        "description": "This configuration is used for running FFI tests on qemu and FFI unit tests."
+        "description": "This configuration is used for running vm unit tests and FFI tests on qemu and FFI unit tests."
       },
       "steps": [
         {
@@ -1302,6 +1302,13 @@
             "gen_snapshot"
           ]
         },
+        {
+          "name": "vm unit tests",
+          "arguments": [
+            "-ndartk-linux-${mode}-arm-qemu",
+            "vm/cc"
+          ]
+        },
         {
           "name": "ffi tests",
           "arguments": [