win32 dll export symbol (drectve) fix

[Jeffrey A Law]

  In message < 199906210438.XAA02394@mercury.xraylith.wisc.edu >you write:
  > Sun Jun 20 12:33:05 1999  Mumit Khan  <khan@xraylith.wisc.edu>
  > 
  > 	* i386/winnt.c (exports_head): New static variable.
  > 	(i386_pe_record_exported_symbol): New function.
  > 	(i386_pe_asm_file_end): Use.
  > 	* i386/cygwin.h (ASM_OUTPUT_COMMON): Record the exported
  > 	symbols to be emitted at end of assembly.
  > 	(ASM_DECLARE_OBJECT_NAME): Likewise.
  > 	(ASM_DECLARE_FUNCTION_NAME): Likewise.
Thanks.  Installed on both the branch and mainline sources.
jeff