lang/seed7: update to 05_20160430

Changes:

• The makefile mk_clangw.mak has been improved, such that compilation with newer versions of clang under windows works better.
• Tests for integer parse have been added to chkexc.sd7.
• The function doRemove in chkccomp.c has been improved to write nothing to the console.
• The function showErrors has been added to chkccomp.c.
• In actutl.c the functions searchAction and findAction have been improved to use fewer parameters and the function getActIllegal has been added.
• In chkccomp.c the function writeReadBufferEmptyMacro has been improved to optionally use _get_stream_buffer_pointers() to define the macro read_buffer_empty.
• The operator 'char conv' has been improved to check if the integer fits in a character.
• Documentation comments have been improved in float.s7i, poll.s7i, actlib.c actutl.c, big_gmp.c, big_rtl.c, bln_rtl.c, bst_rtl.c, chr_rtl.c, cmd_rtl.c, dir_dos.c, dir_win.c, drw_rtl.c, fltlib.c, flt_rtl.c, int_rtl.c, pcs_rtl.c, pollib.c, pol_sel.c, pol_unx.c, prg_comp.c, rfl_data.c, setlib.c, set_rtl.c and str_rtl.c.
• Calls of logFunction have been added to functions in cmdlib.c and flt_rtl.c,.
• Calls of logError have been added to functions in actlib.c, biglib.c, bstlib.c, chrlib.c, cmdlib.c, drwlib.c, fillib.c, fltlib.c, hshlib.c, intlib.c, pcslib.c, pollib.c, prglib.c, rfl_data.c, rfllib.c, sctlib.c, setlib.c, strlib.c and typlib.c.