Fix 'BCCscript' build break.

frameworks/compile/libbcc/include/bcc/bcc.h was updated
in change I3f3d31fc. What used to be "struct BCCscript"
is now "class bcc::BCCscript" for C++ code.

Looks like the framework/base header rsScriptC.h is just
trying to forward-declare the same type, so we just need
to make the same change there.

Change-Id: I6f6f9dd7608af01d519c2e26fd9b5e6649f71902
diff --git a/libs/rs/rsScriptC.h b/libs/rs/rsScriptC.h
index 4f0dff3..ab2db5c8 100644
--- a/libs/rs/rsScriptC.h
+++ b/libs/rs/rsScriptC.h
@@ -21,7 +21,9 @@
 
 #include "RenderScriptEnv.h"
 
-struct BCCscript;
+namespace bcc {
+class BCCscript;
+}
 
 // ---------------------------------------------------------------------------
 namespace android {
@@ -46,7 +48,7 @@
 
     Program_t mProgram;
 
-    BCCscript*    mBccScript;
+    bcc::BCCscript* mBccScript;
 
     const Allocation *ptrToAllocation(const void *) const;