libunwind: make sure all pkgconfig files get included in the devel package
Extra dash prevents libunwind.pc
from getting included in files_devel.
Cebero devel package is missing libunwind.pc
because the pattern "libunwind-*.pc"
is used to populate files_devel. This commit changes the pattern to "libunwind*.pc"
Edited by Tim-Philipp Müller