Change the API of bccPrepareSharedObject().

Change-Id: I2d0ecf6b062b52dc4b6b514d93ba8191920a00aa
diff --git a/lib/ExecutionEngine/bcc.cpp b/lib/ExecutionEngine/bcc.cpp
index 057be50..01ef32f 100644
--- a/lib/ExecutionEngine/bcc.cpp
+++ b/lib/ExecutionEngine/bcc.cpp
@@ -160,14 +160,11 @@
 
 
 extern "C" int bccPrepareSharedObject(BCCScriptRef script,
-                                      char const *cacheDir,
-                                      char const *cacheName,
                                       char const *objPath,
                                       char const *dsoPath,
                                       unsigned long flags) {
   BCC_FUNC_LOGGER();
-  return unwrap(script)->prepareSharedObject(cacheDir, cacheName,
-                                             objPath, dsoPath, flags);
+  return unwrap(script)->prepareSharedObject(objPath, dsoPath, flags);
 }