[CMake] cmake -E cmake_symlink_executable

[Brad King]

Filipe Sousa wrote:
> What about a command that behaves like /bin/ln on unix.
> 
> cmake -E cmake_symlink?

Since it is not an internal implementation detail the name should not 
begin in cmake_.  I've added

cmake -E create_symlink old new

that should work as expected:

/cvsroot/CMake/CMake/Source/cmake.cxx,v  <--  cmake.cxx
new revision: 1.215; previous revision: 1.214

-Brad