cygwin.h: Declare ctor_section, dtor_section drectve_section, switch_to_section.

cygwin.h: Declare ctor_section, dtor_section drectve_section, switch_to_section.

* config/i386/cygwin.h: Declare ctor_section, dtor_section drectve_section,
switch_to_section.
* winnt.c: Declare functions associated_type, gen_stdcall_suffix,
i386_pe_dllexport_p, i386_pe_dllimport_p, i386_pe_mark_dllexport,
i386_pe_mark_dllimport.
* config/i386/cygwin.h: Include <stdio.h> Declare and constify functions
i386_pe_*.
* config/i386/winnt.c: Include "tm_p.h" and "toplev.h" Constify i386_pe_*
functions with char * arguments.

From-SVN: r40661