travis: Save cache even when build or test fail #14231
Merged
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In current travis setup, the job will terminate immediately if an error occur. There is no chance to save the cache. This was accidentally introduced by #13863. This PR is to fix the issue and travis would save cache on error.
test for build error: https://travis-ci.org/bitcoin/bitcoin/builds/429172128