Fix for bug #51847

Fix for bug #51847
Someone in libintl world decided it was a good idea to do:

#undef setlocale
#define setlocale libintl_setlocale

That means, of course, that any use of "setlocale" by the
preprocessor now becomes libintl_setlocale which means we
no longer have a _zif_setlocale symbol in string.o, but we
magically have a _zif_libintl_setlocale symbol.  The linker
is obviously not very happy about this when basic_functions.o
tries to find _zif_setlocale.

So, let's not do that again.