Work around ICU bug 8421 / text-icu bug #1.
Work around ICU bug 8421 / text-icu bug #1.

We can't safely call uregex_setTimeLimit in ICU <= 4.6 unless we first supply
some dummy text to search against.

References:

https://bitbucket.org/bos/text-icu/issue/1
http://bugs.icu-project.org/trac/ticket/8421

bos/text-icu