Fix up previous fix:

• with KF5 5.71, each application can have its own FindTaglib, or uses the one from kdelibs4support (I think). This is generally an "old-style" CMake module.
• with KF5 5.72, ECM delivers a modern CMake module which is found first, but is also incompatible with the old version of FindTaglib.

Adjust the patches so they work with KF5 5.71 (now in-tree) and 5.72
(upcoming). Not bumping PORTREVISION here because the packages could
not have built with the previous patches.

Note to self: do not assume useful backwards-compatibility in CMake
modules from different sources.

PR: 247907