update to regex broke branch-1_4 on cygwin

[ericblake]

Gary, this change:

2005-02-04  Gary V. Vaughan  <address@hidden>

        * lib/regex.c, lib/regex.h: Updated from gnulib.
        * src/input.c (set_word_regexp):  Don't change the word_regexp
        unless it compiles correctly.
        * NEWS: Updated.
        Reported by Frank Schwidom <address@hidden>

        * Makefile.in (stamp-h): Regenerate config.h properly.

broke compilation on cygwin, since newlib does not have gettext() without 
linking with -lintl.

gcc -c -DHAVE_CONFIG_H -I.. -I.  -g -O2 regex.c
regex.c: In function `re_compile_pattern':
regex.c:7884: warning: return makes pointer from integer without a cast
regex.c: In function `regerror':
regex.c:8173: warning: assignment makes pointer from integer without a cast
...
gcc  -o m4 m4.o builtin.o debug.o eval.o format.o freeze.o input.o macro.o 
output.o path.o  symtab.o ../lib/libm4.a 
../lib/libm4.a(regex.o)(.text+0x5f1a): In function `regerror':
/home/eblake/m4/lib/regex.c:8173: undefined reference to `_gettext'
../lib/libm4.a(regex.o)(.text+0x5c3a): In function `re_compile_pattern':
/home/eblake/m4/lib/regex.c:7884: undefined reference to `_gettext'
collect2: ld returned 1 exit status