Bug#719980: libidn does not honour DEB_BUILD_OPTIONS=nocheck

[Wookey]

Package: libidn
Version: 1.28-1
Followup-For: Bug #719980

I found that libidn does not implement DEB_BUILD_OPTIONS=nocheck to skip tests.

The attached patch fixes that. I didn't open a new bug as this is just a
subset of the patch already filed in this bug. (almost identical for that part, 
in fact :-)

I too noticed this problem whilst bootstrapping (arm64). The tests make
qemu arm64 crash, so must be skipped to get a successful build.

Just another example of why this is useful.

-- System Information:
Debian Release: 7.2
  APT prefers stable
  APT policy: (990, 'stable')
Architecture: i386 (i686)

Kernel: Linux 3.2.0-kvm-i386-20110111 (SMP w/1 CPU core)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

libidn_1.28-1-nocheck.patch
Description: Text Data