template: add doc.go to Makefile
template: add doc.go to Makefile

The template package is the only one that has a doc.go not mentioned
in its Makefile.

This doesn't seem to bother godoc, but seems like a bug to me.

$ for d in $(find pkg -name doc.go); do echo $d; grep doc.go $(dirname $d)/Makefile; done
pkg/fmt/doc.go
        doc.go\
pkg/go/doc/doc.go
        doc.go\
pkg/gob/doc.go
        doc.go\
pkg/html/doc.go
        doc.go\
pkg/old/template/doc.go
        doc.go\
pkg/sync/atomic/doc.go
        doc.go\
pkg/template/doc.go

R=r
CC=golang-dev
http://codereview.appspot.com/5003047

d0f/go-zh,sanjosh/sanjos100-tipc,Triskite/willstone-goclone,glycerine/jeaten-go-arrayof-structof,rflanagan/reginaldflanagan-project1,glycerine/jeaten-go-arrayof-structof,mhennings/marcohennings-go,webfd/go-zh,bryanxu/go-zh,rdp/rogerpack2005-golang,glycerine/jeaten-go-arrayof-structof,Triskite/willstone-goclone,Triskite/willstone-goclone,rdp/rogerpack2005-golang,rflanagan/reginaldflanagan-project1,bryanxu/go-zh,webfd/go-zh,glycerine/jeaten-go-arrayof-structof,bryanxu/go-zh,webfd/go-zh,scirelli/scirelli-go,glycerine/jeaten-go-arrayof-structof,scirelli/scirelli-go,d0f/go-zh,rdp/rogerpack2005-golang,Triskite/willstone-goclone,sanjosh/sanjos100-tipc,bryanxu/go-zh,sanjosh/sanjos100-tipc,rflanagan/reginaldflanagan-project1,bryanxu/go-zh,rdp/rogerpack2005-golang,Triskite/willstone-goclone,rflanagan/reginaldflanagan-project1,webfd/go-zh,d0f/go-zh,rflanagan/reginaldflanagan-project1,glycerine/jeaten-go-arrayof-structof,glycerine/jeaten-go-arrayof-structof,glycerine/jeaten-go-arrayof-structof,webfd/go-zh,rdp/rogerpack2005-golang,rdp/rogerpack2005-golang,mhennings/marcohennings-go,scirelli/scirelli-go,scirelli/scirelli-go,bryanxu/go-zh,mhennings/marcohennings-go,sanjosh/sanjos100-tipc,mhennings/marcohennings-go,scirelli/scirelli-go,sanjosh/sanjos100-tipc,bryanxu/go-zh,mhennings/marcohennings-go,scirelli/scirelli-go,mhennings/marcohennings-go,d0f/go-zh,rdp/rogerpack2005-golang,webfd/go-zh,d0f/go-zh,mhennings/marcohennings-go,d0f/go-zh,sanjosh/sanjos100-tipc,sanjosh/sanjos100-tipc,rdp/rogerpack2005-golang,Triskite/willstone-goclone,d0f/go-zh,scirelli/scirelli-go,Triskite/willstone-goclone,sanjosh/sanjos100-tipc,rflanagan/reginaldflanagan-project1,rflanagan/reginaldflanagan-project1,webfd/go-zh,rflanagan/reginaldflanagan-project1,mhennings/marcohennings-go,d0f/go-zh,bryanxu/go-zh,scirelli/scirelli-go,Triskite/willstone-goclone,webfd/go-zh