[CMake] CMake 2.4.1, VC71, VCMIDLTool missing "AdditionalIncludeDirectories" tag

[Rob Mathews]

Title says it all. No way to pass a list of extra include directories to
the MIDL tool because CMake doesn't generate the
AdditionIncludeDirectories tag for the MIDL tool.

The fix is in cmLocalVisualStudio7Generator.cxx, lines 589, insert this
code: 

  fout << "\t\t\t\tAdditionalIncludeDirectories=\"";
  for(i = includes.begin();i != includes.end(); ++i)
  {
	  std::string ipath = this->ConvertToXMLOutputPath(i->c_str());
	  fout << ipath << ";";
  }