Missing dependency on perl-gd

Description:

The lcov package does not mention perl-gd as a dependency, neither required nor optional.

Additional info:

• package version(s): lcov 2.0-2
• config and/or log files: N/A
• link to upstream bug report, if any: N/A

Steps to reproduce:

1. Install lcov but not perl-gd
2. Execute genhtml -f -o /tmp/whatever /dev/null
3. Get the error message ERROR: required module GD.pm not found on this system (see www.cpan.org).

Note that GD.pm is required only if passing the -f switch. So making perl-gd an optional dependency for that may make sense.

Thank you in advance! :)