[abiword:patch] to fix regression introduced on 2012-02-12

Hi everyone,

On 2012-02-12 in commit "Bug 13256 - fix linker flags. Patch from Mageia"
a dangerous regression has been introduced.

The output of pkg-config command is misused by passing to LDADD with great
potential for FTBFS.

See

  http://www.delorie.com/gnu/docs/automake/automake_38.html

This is already causing FTBFS on GNU Hurd and we don't observe greater impact
yet, because by cheer luck in most cases pkg-config returns no -L output like
"-L/usr/lib/i386-gnu".

The attached patch is a remedy for the problem.

Thank you.

Regards,
Dmitry.