[Boost-build] Recent commits broke the link-fail testing on Windows

Subject: [Boost-build] Recent commits broke the link-fail testing on Windows
From: Antony Polukhin (antoshkka_at_[hidden])
Date: 2018-01-14 21:25:57

Hello,

I've started receiving "Tests failed" warnings from CI recently.
Here's an example:
https://ci.appveyor.com/project/apolukhin/type-index/build/1.64.45-develop

All the the tests passed (including tests that must fail to link), but
there's a message "...failed updating 2 targets..." and return code is
not 0.

Looks like the issue is related to link-fail targets in tests
https://github.com/boostorg/type_index/blob/develop/test/Jamfile.v2#L57-L59

-- 
Best regards,
Antony Polukhin