Fixed intrinsics inside a script group

Bug: 27439842

An RS intrinsic relies on RSExpandKernelDriverInfo.usr for the "this"
pointer to the ScriptIntrinsic object.

Need to to correctly set that field in a script execution for intrinsics.

Also fixed a bcc command-line option.

Added a test of script group with intrinsics to ImageProcessing GroupTest(native).

Change-Id: Ia8b45bca3396ac987ba167fd1709ee89123a2557
diff --git a/cpu_ref/rsCpuScript.cpp b/cpu_ref/rsCpuScript.cpp
index 16b3ec6..a5fc96b 100644
--- a/cpu_ref/rsCpuScript.cpp
+++ b/cpu_ref/rsCpuScript.cpp
@@ -107,10 +107,10 @@
     args->push_back("-O");
 
     switch (optLevel) {
-    case (0):
+    case 0:
         args->push_back("0");
         break;
-    case (3):
+    case 3:
         args->push_back("3");
         break;
     default: