Fix gcc_update for libcpp (Was: Re: Mainline bootstrap failure while running aclocal in libcpp)

[Paolo Bonzini]

[Alex, sorry for private mail]

 > Make sure you integrate these into config/gettext.m4 or so, and
 > arrange for the scripts in config to be used, instead of using
 > whatever random version of these macros a user who runs aclocal
 > happens to have around.

It has always been like this.  Maybe it's better to document that 
gettext 0.12 is needed to regenerate configure scripts?

Paolo