If a host build system does not have /usr/bin/wget installed, and
the crash package is built from a directory that was git-cloned
from github.com/crash-utility/crash.git, the error message has
been clarified to indicate "/usr/bin/wget is required to download
gdb-7.6.tar.gz".  Without the patch, the message indicates "tar
(child): gdb-7.6.tar.gz: Cannot open: No such file or directory".
(anderson@redhat.com)