Add data_deps for additional build resources on internal Fuchsia builds.

Also refactor fuchsia_executable_runner to accept data_deps values
from the invoker.


Bug: 
Change-Id: I039548d80b98538692df8b04b4410b09474ad4d8
Reviewed-on: https://chromium-review.googlesource.com/758968Reviewed-by: Scott Graham <scottmg@chromium.org>
Reviewed-by: Luke Halliwell <halliwell@chromium.org>
Commit-Queue: Kevin Marshall <kmarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#515068}

build/config/fuchsia/rules.gni

@@ -126,10 +126,12 @@ template("fuchsia_executable_runner") {
                            [
                              "testonly",
                              "exe_target",
+                             "data_deps",
                            ])
     runner_script = "exe_runner.py"
-    data_deps = [
-      exe_target,
-    ]
+    if (!defined(data_deps)) {
+      data_deps = []
+    }
+    data_deps += [ exe_target ]
   }
 }

chromecast/BUILD.gn

@@ -450,6 +450,12 @@ cast_executable("cast_shell") {
 if (is_fuchsia) {
   fuchsia_executable_runner("cast_shell_fuchsia") {
     exe_target = ":cast_shell"
+
+    if (chromecast_branding != "public") {
+      data_deps = [
+        "//chromecast/internal:fuchsia_internal_data_deps",
+      ]
+    }
   }
 }