doc: add C? Go? Cgo! article

Originally published on The Go Programming Language Blog, March 17, 2011.

http://blog.golang.org/2011/03/c-go-cgo.html

Update #2547.

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/5777054
diff --git a/doc/docs.html b/doc/docs.html
index 9bd0d62..af30dac 100644
--- a/doc/docs.html
+++ b/doc/docs.html
@@ -126,7 +126,7 @@
 
 <ul>
 <li><a href="/doc/articles/go_command.html">About the Go command</a> - why we wrote it, what it is, what it's not, and how to use it.</li>
-<li><a href="http://blog.golang.org/2011/03/c-go-cgo.html">C? Go? Cgo!</a> - linking against C code with <a href="/cmd/cgo/">cgo</a>.</li>
+<li><a href="/doc/articles/c_go_cgo.html">C? Go? Cgo!</a> - linking against C code with <a href="/cmd/cgo/">cgo</a>.</li>
 <li><a href="http://blog.golang.org/2011/03/godoc-documenting-go-code.html">Godoc: documenting Go code</a> - writing good documentation for <a href="/cmd/godoc/">godoc</a>.</li>
 <li><a href="http://blog.golang.org/2011/06/profiling-go-programs.html">Profiling Go Programs</a></li>
 </ul>