[deps] Add dawn_standalone to checkout_siso

https://dawn-review.googlesource.com/c/dawn/+/141226 breaks
chromium hooks.
https://logs.chromium.org/logs/chromium/buildbucket/cr-buildbucket/8775284051095734513/+/u/gclient_runhooks/stdout

The configure_siso hook should have dawn_standalone condition.

Change-Id: I94731e6fe5afd33f42d1af3644e77bec22a0d4ce
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/141600
Auto-Submit: Junji Watanabe <jwata@google.com>
Reviewed-by: Fumitoshi Ukai <ukai@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Antonio Maiorano <amaiorano@google.com>
diff --git a/DEPS b/DEPS
index ebb36ba..f94e040 100644
--- a/DEPS
+++ b/DEPS
@@ -497,7 +497,7 @@
   {
     'name': 'configure_siso',
     'pattern': '.',
-    'condition': 'checkout_siso',
+    'condition': 'checkout_siso and dawn_standalone',
     'action': ['python3',
                'build/config/siso/configure_siso.py',
                '--rbe_instance',