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