Bug#950957: libtime-mock-perl FTBFS with debhelper >= 12.7.3

[Adrian Bunk]

Source: libtime-mock-perl
Version: 0.0.2-5
Severity: serious
Tags: ftbfs

https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/libtime-mock-perl.html

...
   dh_gencontrol
dpkg-gencontrol: warning: can't parse dependency perl:any:any
dpkg-gencontrol: error: error occurred while parsing Depends field: , perl:any:any
dh_gencontrol: error: dpkg-gencontrol -plibtime-mock-perl -ldebian/changelog -Tdebian/libtime-mock-perl.substvars -Pdebian/libtime-mock-perl returned exit code 25
dh_gencontrol: error: Aborting due to earlier error
make: *** [debian/rules:4: binary] Error 25


See #946655 for background.