support for golang 1.5

[asdfsx]

I'm using golang 1.5
when I try to install golint, I got the errors bellow

package golang.org/x/tools/go/gcimporter: unrecognized import path "golang.org/x/tools/go/gcimporter"
package golang.org/x/tools/go/types: unrecognized import path "golang.org/x/tools/go/types"

[dsymonds]

You have an old golang.org/x/tools repo. Delete $GOPATH/src/golang.org/x/tools and re-fetch it.

[asdfsx]

thx!!!! @dsymonds