Remove ash dependency
shc fails to build from source (see https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1072469) because the binary package ash was dropped with dash 0.5.12-7 (see https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=920644)
Upstream: https://github.com/neurobin/shc/pull/167 Debian: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1072469 Ubuntu: https://bugs.launchpad.net/ubuntu/+source/dash/+bug/2073141 Signed-off-by: Dominik Viererbe dominik.viererbe@canonical.com