[Bitcoin-ABC/bitcoin-abc] add test for transaction sort in block (#245)

maybe a bug for transaction sort in block; when mining, the transactions in block Sorted in descending order;but when a New block connect, check transactions in block with ascending order .
You can view, comment on, or merge this pull request online at:

https://github.com/Bitcoin-ABC/bitcoin-abc/pull/245

— Commit Summary —

* add test for transaction sort in block

— File Changes —

M src/test/miner_tests.cpp (48)

— Patch Links —

https://github.com/Bitcoin-ABC/bitcoin-abc/pull/245.patch
https://github.com/Bitcoin-ABC/bitcoin-abc/pull/245.diff