[patch, gfortran] Implement some more g77 intrinsics

[François-Xavier Coudert]

Since this is my first patch, I hope I did it right. Attached is the 
diff and the new files to be included.

As I did not yet receive the paperwork for copyright assignment, I 
hereby donate this code to the Free Software Fundation, and I hope it is 
enough.


2005-01-31  François-Xavier Coudert <coudert@clipper.ens.fr>

	Implement more g77 intrinsic functions and subroutines.
	* chdir.c, gerror.c, getlog.c, hostnm.c, ierrno.c, kill.c,
	link.c, perror.c, rename.c, sleep.c, symlnk.c, time.c: implement
	intrinsics themselves.

	* gcc/fortran/check.c, gcc/fortran/gfortran.h,
	gcc/fortran/intrinsic.c, gcc/fortran/intrinsic.h,
	gcc/fortran/iresolve.c, gcc/fortran/trans-intrinsic.c,
	libgfortran/Makefile.am, libgfortran/configure.ac:

	* gcc/fortran/invoke.texi: corrected typos.
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