chdir.c, [...]: Include <string.h> for prototypes.

chdir.c, [...]: Include <string.h> for prototypes.

	* intrinsics/chdir.c, intrinsics/getlog.c, intrinsics/link.c,
	intrinsics/symlnk.c, intrinsics/perror.c: Include <string.h> for
	prototypes.

	* runtime/string.c (compare0): Remove unused variable.
	* io/unit.c (init_units): Remove unused variables.
	* intrinsics/getcwd.c (getcwd_i4_sub): Remove unused variable.
	* intrinsics/unlink.c (unlink_i4_sub): Remove unused variable.
	* intrinsics/stat.c (stat_i4_sub, fstat_i8_sub, fstat_i4_sub,
	stat_i8_sub): Remove unused variable.

From-SVN: r99716