[ignition] Update interrupt budget on suspend

Now that SuspendGenerator returns, we have to update the interrupt
budget during that return to ensure that generators can be optimized.

Bug: chromium:804796
Change-Id: I8a9fa1c2399da81a3c2a7d8a07a774d5648d1c5e
Reviewed-on: https://chromium-review.googlesource.com/880821Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50796}

src/interpreter/interpreter-generator.cc

@@ -3103,6 +3103,8 @@ IGNITION_HANDLER(SuspendGenerator, InterpreterAssembler) {
   Node* offset = SmiTag(BytecodeOffset());
   StoreObjectField(generator, JSGeneratorObject::kInputOrDebugPosOffset,
                    offset);
+
+  UpdateInterruptBudgetOnReturn();
   Return(GetAccumulator());
 }