Bug#776011: jruby: FTBFS in jessie and sid on arm

[Andrew Lee (=?UTF-8?Q?=E6=9D=8E=E5=81=A5=E7=A7=8B?=)]

Package: jruby
Version: 1.5.6-9
Severity: important

Dear Maintainer,

I got jruby ftbfs reproduced in jessie and sid chroot on arm porterbox.
The ftbfs log:
    https://people.debian.org/~ajqlee/log/jruby_1.5.6-9_armhf.build.jessie
    https://people.debian.org/~ajqlee/log/jruby_1.5.6-9_armel.build

Best regards,
-Andrew

-- System Information:
Debian Release: 7.8
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 3.14-0.bpo.2-amd64 (SMP w/4 CPU cores)
Locale: LANG=zh_TW.UTF-8, LC_CTYPE=zh_TW.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash