Fix Android build (llround)

Change-Id: I4f412f36f690bb2857ffa8c6188a9a4ce3994730
Reviewed-on: https://gerrit.libreoffice.org/30607
Reviewed-by: Julien Nabet <serval2412@yahoo.fr>
Tested-by: Julien Nabet <serval2412@yahoo.fr>

basic/source/sbx/sbxconv.hxx

@@ -28,6 +28,10 @@ double lround(double d)
 {
     return d + ( d < 0 ? -0.5 : 0.5 );
 }
+double llround(double d)
+{
+    return d + ( d < 0 ? -0.5 : 0.5 );
+}
 }
 #endif