doc/go1.2: document that godoc and vet will always be installed to their old locations (not $GOPATH/bin).

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/13830043
diff --git a/doc/go1.2.html b/doc/go1.2.html
index 2dc90f8..29e42bb 100644
--- a/doc/go1.2.html
+++ b/doc/go1.2.html
@@ -175,6 +175,8 @@
 
 <p>
 When building from source, users must use "go get" to install godoc and vet.
+(The binaries will continue to be installed in their usual locations, not
+<code>$GOPATH/bin</code>.)
 </p>
 
 <pre>