test: Fix default connection spec to execute test by non-root user
Revert "apt: Precise installs ruby-glib2 under /lib directory not /usr/lib"

This reverts commit dc6384c5154f3fe4ac73734b216740ed0c8d7b4c.

We want to support multiarch on precise.
Add missing prefix to bundled ruby-glib2 Makefile

This fixes RUBYARCHDIR, RUBYLIBDIR and libdir when following options

    ./configure \
    --build=i686-linux-gnu \
    --prefix=/usr \
    --includedir=\${prefix}/include \
    --mandir=\${prefix}/share/man \
    --infodir=\${prefix}/share/info \
    --sysconfdir=/etc \
    --localstatedir=/var \
    --libdir=\${prefix}/lib/i386-linux-gnu \
    --libexecdir=\${prefix}/lib/i386-linux-gnu \
    --disable-maintainer-mode \
    --disable-dependency-tracking \
    --with-default-effective-user=milter-manager \
    --with-default-effective-group=mail \
    --with-default-socket-group=mail \
    --with-default-pid-file=/run/milter-manager/milter-manager.pid \
    --with-default-connection-spec=unix:/run/milter-manager/milter-manager.sock \
    --with-ruby=/usr/bin/ruby1.9.1 \
    --enable-ruby-milter=/usr/lib/ruby/vendor_ruby \
    --with-bundled-ruby-glib2

libdir in binding/ruby/glib-2.2.0/Makefile is expanded as followings

    libdir = $(DESTDIR)${prefix}/lib/i386-linux