lang/seed7: update to 05_20160229

Changes:

- The function fltCmp in flt_rtl.c has been improved to work correct
  in the case that isnan returns neither 0 nor 1 (Many thanks go to
  Arnel L. for reporting this problem).
- The function determineGetaddrlimit in chkccomp.c has been improved
  to include <sys/types.h> before <sys/resource.h>. FreeBSD needs
  that to work correctly (Many thanks go to Pietro Cerutti for
  providing a fix and explaining the background).
- The function getOsCwd has been added to cmd_rtl.c. With this
  function it is possible to read (e.g. under Linux) a current
  working directory that is longer than PATH_MAX.
- Documentation comments have been improved in encoding.s7i.
- The program chkccomp.c has been improved to write definitions of
  USE_DIRENT, USE_DIRWIN, OS_WIDE_DIR_INCLUDE_DIR_H, os_DIR,
  os_dirent_struct, os_opendir, os_readdir, os_closedir,
  INCLUDE_SYS_UTIME, os_utimbuf_struct, USE_ALTERNATE_UTIME,
  os_utime_orig, os_utime, os_chdir, OS_GETCWD_MAX_BUFFER_SIZE,
  os_getcwd, os_mkdir, os_rmdir, OS_CHMOD_INCLUDE_IO_H, os_chmod,
  os_remove, os_rename, os_system, os_fopen, os_popen, os_pclose,
  DEFINE_WGETENV, os_getenv
- The functions keys_helem and values_helem in hshlib.c and
  hsh_rtl.c have been improved to use a loop instead of a tail
  recursion. For compilers that don't recognize the tail recursion
  this results in a speed improvement (Gcc recognizes tail
  recursions so there is no speed improvement).
- The functions free_helem and free_hash in hsh_rtl.c have been
  improved to stop searching for helems as soon as the last helem
  has been freed.
- The functions helem_data_to_list and helem_key_to_list have been
  improved to use a loop instead of a tail recursion (see above).

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