Fix wget on x86-64.

Define HAVE_ARPA_INET_H for the wget build. Otherwise, e.g. inet_ntoa
would get an implicit declaration with a return type of int, leading to
the returned character pointer getting truncated on x86-64, and
consequently random crashes.

src/bin/network/wget/Jamfile

@@ -2,7 +2,7 @@ SubDir HAIKU_TOP src bin network wget ;
 
 UseHeaders [ FDirName $(SUBDIR) src ] : true ;
 
-local defines = [ FDefines HAVE_CONFIG_H=1 ] ;
+local defines = [ FDefines HAVE_CONFIG_H=1 HAVE_ARPA_INET_H=1 ] ;
 
 SubDirCcFlags $(defines) ;
 SubDirC++Flags $(defines) ;