mingw64 fixes: update external-tests.pd.
The library regression test now accepts 2176 objects for a successful test, which is the number we currently have for mingw64 (down from the previous value of 2251).
The library regression test now accepts 2176 objects for a successful test, which is the number we currently have for mingw64 (down from the previous value of 2251).
mentioned in commit 1983b16e
·mentioned in commit 1983b16e