Fix bug where inputs are updated from action cache but not tracked in…

… Skyframe.

This bug, and all of them like it, will be fixed in an upcoming cl that makes sure all input metadata is obtained through Skyframe. But I think we should have this fix now.

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MOS_MIGRATED_REVID=89540265

src/main/java/com/google/devtools/build/lib/skyframe/ActionExecutionFunction.java

@@ -214,6 +214,10 @@ private ActionExecutionValue checkCacheAndExecuteIfNeeded(
     }
 
     if (state.token == null) {
+      if (action.discoversInputs()) {
+        // Action may have had its inputs updated. Keep track of those new inputs.
+        declareAdditionalDependencies(env, action);
+      }
       // We got a hit from the action cache -- no need to execute.
       return new ActionExecutionValue(
           fileAndMetadataCache.getOutputData(),