sk_tools/Resources: optional SK_TOOLS_REQUIRE_RESOURCES flag

BUG=skia:7842
Change-Id: I1ce7d12308cd8ee101163d73dfc79f2d2155c632
Reviewed-on: https://skia-review.googlesource.com/123425
Auto-Submit: Hal Canary <halcanary@google.com>
Commit-Queue: Florin Malita <fmalita@chromium.org>
Reviewed-by: Florin Malita <fmalita@chromium.org>
diff --git a/tools/skqp/generate_gn_args b/tools/skqp/generate_gn_args
index c9b1891..889f427 100755
--- a/tools/skqp/generate_gn_args
+++ b/tools/skqp/generate_gn_args
@@ -24,6 +24,7 @@
 skia_use_piex = false
 skia_use_skcms = false
 skia_skqp_enable_driver_correctness_workarounds = {enable_workarounds}
+skia_tools_require_resources = true
 '''
 
 def parse_args():