Use build fingerprint and compile command for caching.

If either of those have changed, we need to invalidate the
compiled bit code.

Change-Id: Ic0c392ea5bfff5bf6dc8511740306895b1b12c82
diff --git a/cpu_ref/rsCpuScript.h b/cpu_ref/rsCpuScript.h
index 7531a86..666379d 100644
--- a/cpu_ref/rsCpuScript.h
+++ b/cpu_ref/rsCpuScript.h
@@ -112,7 +112,8 @@
     const Script *mScript;
 
 #ifndef RS_COMPATIBILITY_LIB
-    const char* findCoreLib(const bcinfo::MetadataExtractor& ME, const char* bitcode,
+    // Returns the path to the core library we'll use.
+    const char* findCoreLib(const bcinfo::MetadataExtractor& bitCodeMetaData, const char* bitcode,
                             size_t bitcodeSize);
     int (*mRoot)();
     int (*mRootExpand)();
@@ -150,10 +151,8 @@
     Allocation **mBoundAllocs;
     void * mIntrinsicData;
     bool mIsThreadable;
-
 };
 
-
 Allocation * rsdScriptGetAllocationForPointer(
                         const Context *dc,
                         const Script *script,