build: Allow HHVM 3.21+ failures in Travis
authorTimo Tijhof <krinklemail@gmail.com>
Fri, 8 Jun 2018 14:22:43 +0000 (16:22 +0200)
committerTimo Tijhof <krinklemail@gmail.com>
Fri, 8 Jun 2018 14:22:43 +0000 (16:22 +0200)
commitf2894092b8ee4ec26a63cb49993dd9c606489133
tree231b0018019bb31f7c918771e5fe1a2fd1a9d2a7
parent43c2aa6fb51f7a536c5be89bc4345f69498d8d8d
build: Allow HHVM 3.21+ failures in Travis

Keep them in the post-merge matrix, but don't make its failure
affect the commit status indicator (e.g. "non-voting").

Wikimedia only runs HHVM 3.18 in production at the moment, and
it seems these newer versions don't currently pass the test and
fixing them is probably not a priority at the moment.

Follows-up 8fde6115a8368e.

Change-Id: I8f6e637882e89663257cafd8c832f71131a9c488
.travis.yml