hook-functions: make copy_libgcc to not take any parameters
The initramfs-tools hook from multipath-tools 0.9.4-9 and newer calls
copy_libgcc
without any arguments. This will fail:
mkinitramfs: copy_file: binary '/libgcc_s.so.[1-9]' not found
Instead of relying on multipath-tools to figure out the correct library
path, make copy_libgcc
to not take any parameters.
LP: #2085157