diagnostics: Fix libcros_healthd_executor test target for fuzzer

The config currently only supports use=TEST so it causes fuzzer
builder to fail. We need to include the dependencies when either
test or fuzzer are enabled.

BUG=chromium:1110002
TEST=USE="asan fuzzer" emerge-amd64-generic diagnostics

Change-Id: If5478edcc0380fe50a91106902f11f30ff66fc8c
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform2/+/2324461
Commit-Queue: Tiancong Wang <tcwang@google.com>
Commit-Queue: Paul Moy <pmoy@chromium.org>
Tested-by: Tiancong Wang <tcwang@google.com>
Tested-by: Paul Moy <pmoy@chromium.org>
Reviewed-by: Paul Moy <pmoy@chromium.org>
diff --git a/diagnostics/cros_healthd/executor/BUILD.gn b/diagnostics/cros_healthd/executor/BUILD.gn
index c8e0f84..06af58d 100644
--- a/diagnostics/cros_healthd/executor/BUILD.gn
+++ b/diagnostics/cros_healthd/executor/BUILD.gn
@@ -24,7 +24,7 @@
   ]
 }
 
-if (use.test) {
+if (use.test || use.fuzzer) {
   source_set("libcros_healthd_executor_test_utils") {
     deps = [ "//diagnostics/mojo:cros_healthd_executor_mojo_bindings" ]
     sources = [ "mock_executor_adapter.cc" ]