doc: consistent path names in example

Always use /home/you for $HOME in examples.

Trivial enough that someone else can integrate this change if they are editing go1.1.html

R=r
CC=golang-dev
https://golang.org/cl/8025043

doc/go1.1.html

@@ -309,7 +309,7 @@ when <code>$GOPATH</code> and <code>$GOROOT</code> are set to the same value.
 
 <pre>
 $ GOPATH=$GOROOT go get code.google.com/p/foo/quxx
-warning: GOPATH set to GOROOT (/home/User/go) has no effect
+warning: GOPATH set to GOROOT (/home/you/go) has no effect
 package code.google.com/p/foo/quxx: cannot download, $GOPATH must not be set to $GOROOT. For more details see: go help gopath
 </pre>