Removed dash in wildcard selection of libunwind*.pc files.
Removed dash in wildcard selection of libunwind*.pc files.

Extra dash prevents libunwind.pc from getting included in files_devel.

Part-of: <https://gitlab.freedesktop.org/gstreamer/cerbero/-/merge_requests/722>

nirbheek/cerbero,nirbheek/cerbero,nirbheek/cerbero,nirbheek/cerbero