Adding ability to dirty the allocation and notify shaders using it.

Change-Id: Id5ac8dbba5185cb1f43bedcf4098fcef9f477c51
diff --git a/libs/rs/rsScriptC_Lib.cpp b/libs/rs/rsScriptC_Lib.cpp
index b4b32bb..41828dc 100644
--- a/libs/rs/rsScriptC_Lib.cpp
+++ b/libs/rs/rsScriptC_Lib.cpp
@@ -356,6 +356,11 @@
     return (int)alloc;
 }
 
+void SC_allocationMarkDirty(RsAllocation a)
+{
+    Allocation *alloc = static_cast<Allocation *>(a);
+    alloc->sendDirty();
+}
 
 void SC_ForEach(RsScript vs,
                 RsAllocation vin,
@@ -422,6 +427,8 @@
     { "_Z13rsClearObjectP13rs_allocation", (void *)&SC_clearObject },
     { "_Z10rsIsObject13rs_allocation", (void *)&SC_isObject },
 
+    { "_Z21rsAllocationMarkDirty13rs_allocation", (void *)&SC_allocationMarkDirty },
+
 
     // Debug
     { "_Z7rsDebugPKcf", (void *)&SC_debugF },