Bug#861690: gerris: FTBFS - uses dh-exec without Build-Depends on it

[Niels Thykier]

Source: gerris
Version: 20131206+dfsg-15
Severity: serious

Hi,

The just uploaded version of gerris FTBFS as it uses dh-exec without
Build-Depends on dh-exec.

Thanks,
~Niels