initfile.cc: use new platform identification macros in find_executable_path()

Signed-off-by: Steven Noonan <steven@uplinklabs.net>

Created by  Steven Noonan  on October 13, 2009
DTOG37I3NPNHUQJAA3GINOFNWW262AA5OGI4DXTORBLZG6SBSKWQC
Change contents