Enable autovectorization in CPU driver.

Change-Id: Ibc10c61dee8d071256a9ebd6c4c47cb7dc617284
diff --git a/cpu_ref/rsCpuScript.cpp b/cpu_ref/rsCpuScript.cpp
index 6c534cf..f38c898 100644
--- a/cpu_ref/rsCpuScript.cpp
+++ b/cpu_ref/rsCpuScript.cpp
@@ -249,6 +249,8 @@
                                 const char* bccPluginName) {
     rsAssert(cacheDir && resName && core_lib);
     args->push_back(BCC_EXE_PATH);
+    args->push_back("-unroll-runtime");
+    args->push_back("-scalarize-load-store");
     args->push_back("-o");
     args->push_back(resName);
     args->push_back("-output_path");