asn1: marshal true as 255, not 1.
asn1: marshal true as 255, not 1.

OS X, at least, appears to test |byte == 255|, not |byte != 0| to
establish if a bool is true or false.

R=golang-dev, r
CC=golang-dev
http://codereview.appspot.com/4128064

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