travis: do not cache ./external

Caching the `./external` directory means that any changes to
`external/Makefile` or any updates of the submodules in `./external/*`
would not be picked up and travis would run with old instances of those,
possibly "activating" such changes after weeks or months when the cache
is pruned eventually.

Changelog-None
This commit is contained in:
Vasil Dimov 2020-03-06 11:17:37 +01:00 committed by Christian Decker
parent 37105497f0
commit 2b2ee87801

View file

@ -38,7 +38,6 @@ env:
cache:
directories:
- dependencies
- external
script:
.travis/build.sh