Bug#668692: nqp: FTBFS on 32-bit architectures: two bigint tests fail

[Aaron M. Ucko]

Source: nqp
Version: 0.1~2012.01-1
Severity: serious
Justification: fails to build from source

Builds of nqp on 32-bit architectures have been failing with the error

Test Summary Report
-------------------
t/nqp/60-bigint.t             (Wstat: 0 Tests: 31 Failed: 2)
  Failed tests:  27-28

This appears to be the same as https://github.com/perl6/nqp/issues/28 ,
which indicates that the tests in question concern round-tripping,
which may well be sensitive to word size:

https://github.com/perl6/nqp/tree/2012.01/t/nqp/60-bigint.t#L78

Could you please take a look?

Thanks!