Shorten a test file name

diff --git a/t/900_bug/005_more_than_32_bit_int_on_32_bit_systems.t b/t/900_bug/005_large_int.t
similarity index 100%
rename from t/900_bug/005_more_than_32_bit_int_on_32_bit_systems.t
rename to t/900_bug/005_large_int.t