cgo: export unsafe.Pointer as void*
cgo: export unsafe.Pointer as void*

This will enable functions which use unsafe.Pointer as an argument
to be correctly exported by cgo.

R=rsc
CC=golang-dev
http://codereview.appspot.com/3849043

Committer: Russ Cox <5ad239cb8a44f659eaaee0aa1ea5b94947abe557@golang.org>

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