Bug 10729: Add phrases configuration for ICU

Add a separate phrases-icu.xml for phrase indexes
The file is based on that distributed with zebra
with a couple of additions to reflect Koha usage

This patch adds a separate tokenizer variable
for phrase indexes so that default.idx is
correctly rewritten for sites using icu
indexing

Signed-off-by: Paola Rossi <paola.rossi@cineca.it>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
- Applied patch
- perl Makefile.PL --prev-install-log ../koha-dev/misc/koha-install-log
- make upgrade
- Restarted Zebra server
- Did a full reindex of bibliographic and authorities
- Checked various searches
- Links records to authorities
- Checked created links work correctly

I couldn't find a regression with this patch.
Passes all tests and QA script.

Signed-off-by: Galen Charlton <gmc@esilibrary.com>
(cherry picked from commit 735381b371b128fed13b8b34c97746af21a17282)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>