Fixed typo. "a a" -> "a"

Change-Id: I600d6f7f5d87766cd841a5e8177581d33dcdd282

docs/html/guide/topics/graphics/renderscript.jd

@@ -630,7 +630,7 @@ int root(int launchID) {
     <dt><code>ScriptC_helloworld</code></dt>
 
     <dd>This class is generated by the Android build tools and is the reflected version of the
-    <code>helloworld.rs</code> Renderscript. It provides a a high level entry point into the
+    <code>helloworld.rs</code> Renderscript. It provides a high level entry point into the
     <code>helloworld.rs</code> native code by defining the corresponding methods that you can call
     from the traditional framework APIs.</dd>