[DRE-maint] Bug#854522: ruby-debian: dpkg-checkdeps raises errors with dpkg >= 1.18.11

[James Lu]

Package: ruby-debian
Version: 0.3.9+b6
Tags: patch
Severity: minor

dpkg >= 1.18.11 dropped the --print-installation-architecture option as
obsolete, causing dpkg-checkdeps to throw an error on start. The
attached patch replaces that call with 'dpkg --print-architecture' instead.

The exact error looks like this:

dpkg: error: unknown option --print-installation-architecture

Type dpkg --help for help about installing and deinstalling packages [*];
Use 'apt' or 'aptitude' for user-friendly package management;
Type dpkg -Dhelp for a list of dpkg debug flag values;
Type dpkg --force-help for a list of forcing options;
Type dpkg-deb --help for help about manipulating *.deb files;

Options marked [*] produce a lot of output - pipe it through 'less' or
'more' !

Best,
James

-- System Information:
Debian Release: 9.0
  APT prefers testing
  APT policy: (700, 'testing'), (500, 'unstable-debug'), (500,
'testing-debug'), (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.9.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_CA.UTF-8, LC_CTYPE=en_CA.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages ruby-debian depends on:
ii  libapt-pkg5.0  1.4~beta4
ii  libc6          2.24-9
ii  libgcc1        1:6.3.0-5
ii  libgmp10       2:6.1.2+dfsg-1
ii  libruby2.3     2.3.3-1
ii  libstdc++6     6.3.0-5
ii  ruby           1:2.3.3

ruby-debian recommends no packages.

ruby-debian suggests no packages.

-- no debconf information
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