docs: fix a counting fail

SVN-Revision: 21621

docs/build.tex

@@ -182,7 +182,7 @@ and packages will be in the "\texttt{bin/packages}" directory.
 
 One of the things that we've attempted to do with OpenWrt's template system is make it
 incredibly easy to port software to OpenWrt. If you look at a typical package directory
-in OpenWrt you'll find two things:
+in OpenWrt you'll find several things:
 
 \begin{itemize}
     \item \texttt{package/\textit{<name>}/Makefile}