add missing 'ac_cv_sizeof_unsigned_long_long' variable

SVN-Revision: 13970

include/site/i486-linux

@@ -23,5 +23,6 @@ ac_cv_sizeof_uint32_t=4
 ac_cv_sizeof_uint64_t=8
 ac_cv_sizeof_unsigned_int=4
 ac_cv_sizeof_unsigned_long=4
+ac_cv_sizeof_unsigned_long_long=8
 ac_cv_sizeof_unsigned_short=2
 ac_cv_sizeof_void_p=4