Update imageprocessing to remove generated files.
Fix thread launch race condition.

Change-Id: I24d7f87ac87db6f9e3418d6a429471a71d2c9e9d
diff --git a/libs/rs/rsContext.h b/libs/rs/rsContext.h
index 98ad3a4..b8fffbf 100644
--- a/libs/rs/rsContext.h
+++ b/libs/rs/rsContext.h
@@ -174,6 +174,7 @@
     bool ext_OES_texture_npot() const {return mGL.OES_texture_npot;}
 
     void launchThreads(WorkerCallback_t cbk, void *data);
+    uint32_t getWorkerPoolSize() const {return (uint32_t)mWorkers.mRunningCount;}
 
 protected:
     Device *mDev;