travis-ci: fix GNU sed for macOS, homebrew changed how it works
travis-ci: fix GNU sed for macOS, homebrew changed how it works

++brew install gnu-sed --with-default-names
Warning: gnu-sed: this formula has no --with-default-names option so it will be ignored!
==> Downloading https://homebrew.bintray.com/bottles/gnu-sed-4.7.high_sierra.bot
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==> Pouring gnu-sed-4.7.high_sierra.bottle.2.tar.gz
==> Caveats
GNU "sed" has been installed as "gsed".
If you need to use it as "sed", you can add a "gnubin" directory
to your PATH from your bashrc like:
    PATH="/usr/local/opt/gnu-sed/libexec/gnubin:$PATH"

f-droid/fdroidserver,f-droid/fdroidserver,fdroidtravis/fdroidserver,f-droid/fdroidserver,f-droid/fdroid-server,f-droid/fdroid-server,f-droid/fdroid-server,f-droid/fdroid-server,fdroidtravis/fdroidserver,fdroidtravis/fdroidserver,f-droid/fdroid-server,f-droid/fdroidserver,fdroidtravis/fdroidserver,f-droid/fdroidserver