crypto/tls/generate_cert.go: fix misspelling of O_CREATE. Fixes issue 1888.
crypto/tls/generate_cert.go: fix misspelling of O_CREATE.
Fixes issue 1888.

R=ken
CC=golang-dev
http://codereview.appspot.com/4515148

d0f/go-zh,rflanagan/reginaldflanagan-project1,mhennings/marcohennings-go,Triskite/willstone-goclone,rdp/rogerpack2005-golang,sanjosh/sanjos100-tipc,bryanxu/go-zh,mhennings/marcohennings-go,d0f/go-zh,webfd/go-zh,sanjosh/sanjos100-tipc,d0f/go-zh,npe9/noahevans-go9,Triskite/willstone-goclone,bryanxu/go-zh,rdp/rogerpack2005-golang,mhennings/marcohennings-go,rdp/rogerpack2005-golang,Triskite/willstone-goclone,scirelli/scirelli-go,glycerine/jeaten-go-arrayof-structof,scirelli/scirelli-go,sanjosh/sanjos100-tipc,d0f/go-zh,bryanxu/go-zh,bryanxu/go-zh,rflanagan/reginaldflanagan-project1,scirelli/scirelli-go,mhennings/marcohennings-go,webfd/go-zh,sanjosh/sanjos100-tipc,Triskite/willstone-goclone,webfd/go-zh,npe9/noahevans-go9,scirelli/scirelli-go,sanjosh/sanjos100-tipc,webfd/go-zh,glycerine/jeaten-go-arrayof-structof,webfd/go-zh,glycerine/jeaten-go-arrayof-structof,rflanagan/reginaldflanagan-project1,webfd/go-zh,bryanxu/go-zh,npe9/noahevans-go9,glycerine/jeaten-go-arrayof-structof,rdp/rogerpack2005-golang,bryanxu/go-zh,rdp/rogerpack2005-golang,npe9/noahevans-go9,sanjosh/sanjos100-tipc,rflanagan/reginaldflanagan-project1,rflanagan/reginaldflanagan-project1,rdp/rogerpack2005-golang,Triskite/willstone-goclone,scirelli/scirelli-go,glycerine/jeaten-go-arrayof-structof,glycerine/jeaten-go-arrayof-structof,npe9/noahevans-go9,rflanagan/reginaldflanagan-project1,rdp/rogerpack2005-golang,npe9/noahevans-go9,mhennings/marcohennings-go,d0f/go-zh,rflanagan/reginaldflanagan-project1,webfd/go-zh,rdp/rogerpack2005-golang,d0f/go-zh,sanjosh/sanjos100-tipc,npe9/noahevans-go9,Triskite/willstone-goclone,glycerine/jeaten-go-arrayof-structof,bryanxu/go-zh,rflanagan/reginaldflanagan-project1,d0f/go-zh,npe9/noahevans-go9,scirelli/scirelli-go,scirelli/scirelli-go,mhennings/marcohennings-go,d0f/go-zh,bryanxu/go-zh,scirelli/scirelli-go,webfd/go-zh,mhennings/marcohennings-go,sanjosh/sanjos100-tipc,Triskite/willstone-goclone,mhennings/marcohennings-go,glycerine/jeaten-go-arrayof-structof,Triskite/willstone-goclone