Bug#913487: ddnet accesses the internet during the build

[Adrian Bunk]

Source: ddnet
Version: 11.4.6-1
Severity: serious
Tags: ftbfs

https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/ddnet.html
https://buildd.debian.org/status/fetch.php?pkg=ddnet&arch=armel&ver=11.4.6-1&stamp=1541728808&raw=0

...
[ RUN      ] Jobs.LookupHost
/<<PKGBUILDDIR>>/src/test/jobs.cpp:72: Failure
Expected equality of these values:
  pJob->m_Result
    Which is: -1
  0
[  FAILED  ] Jobs.LookupHost (74 ms)
...
[  PASSED  ] 55 tests.
[  FAILED  ] 1 test, listed below:
[  FAILED  ] Jobs.LookupHost

 1 FAILED TEST
make[5]: *** [CMakeFiles/run_tests.dir/build.make:61: CMakeFiles/run_tests] Error 1