EDK: Split the mojo_edk_system_unittests target.

mojo/tools/data/unittests

Index: mojo/tools/data/unittests
diff --git a/mojo/tools/data/unittests b/mojo/tools/data/unittests
index a9e9d9bf6a87fab8ea1bcbcf2c3b890cd98e989b..30f03d5f8df22acc0fc13a59ebaa04f77ccfe44e 100644
--- a/mojo/tools/data/unittests
+++ b/mojo/tools/data/unittests
@@ -5,10 +5,19 @@
 # TODO(vtl): Add a way of specifying data dependencies instead of cacheable.
 
 tests = [
-  # System tests:
+  # EDK tests:
+  {
+    "test": "mojo_edk_embedder_unittests",
+  },
   {
     "test": "mojo_edk_system_unittests",
   },
+  {
+    "test": "mojo_edk_system_test_unittests",
+  },
+  {
+    "test": "mojo_edk_util_unittests",
+  },
 
   # Public tests:
   {