Dirty compile on OS X

[Jeffrey Walton]

gmake[3]: Entering directory '/Users/Build-Scripts/libidn2-2.0.4/src'
  CC       libidn2_cmd_la-idn2_cmd.lo
  CC       idn2.o
In file included from idn2.c:37:
../gl/gettext.h:220:19: warning: variable length array used [-Wvla]
  char msg_ctxt_id[msgctxt_len + msgid_len];
                  ^
../gl/gettext.h:268:19: warning: variable length array used [-Wvla]
  char msg_ctxt_id[msgctxt_len + msgid_len];
                  ^
idn2.c:151:13: warning: string literal of length 28846 exceeds maximum length
      4095 that ISO C99 compilers are required to support [-Woverlength-strings]
      puts (CONDITIONS);
            ^~~~~~~~~~
./blurbs.h:35:3: note: expanded from macro 'CONDITIONS'
  "                       TERMS AND CONDITIONS\n"                       \
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3 warnings generated.