gettext: fix formatting issues

gettext: fix formatting issues

Fixed when compile with "-Wformat -Wformat-security -Werror=format-security":
| gettext-tools/gnulib-lib/libcroco/cr-statement.c: In function 'cr_statement_dump_charset':
| gettext-tools/gnulib-lib/libcroco/cr-statement.c:2661:17: error: format not a string literal and no format arguments [-Werror=format-security]
|                  fprintf (a_fp, str) ;

And:
gettext-tools/gnulib-lib/libxml/timsort.h:326:80: warning: format '%lu' expects argument of type 'long unsigned int', but argument 3 has type 'unsigned int' [-Wformat=]
       fprintf(stderr, "Error allocating temporary storage for tim sort: need %lu bytes", sizeof(SORT_TYPE) * new_size);

[YOCTO #9544]

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>