textproc/zorba: unbreak with ICU 61

In file included from src/functions/func_any_uri.cpp:27:
In file included from src/functions/func_any_uri.h:30:
In file included from src/functions/function_impl.h:25:
In file included from src/context/static_context.h:43:
In file included from src/zorbautils/hashmap_zstring.h:23:
src/util/utf8_util.h:784:22: error: unknown type name 'Collator'; did you mean 'UCollator'?

return static_cast<Collator*>( collation->getCollator() )->compare(us1, us2);
                   ^~~~~~~~
                   UCollator

/usr/local/include/unicode/ucol.h:58:26: note: 'UCollator' declared here
typedef struct UCollator UCollator;

^

In file included from src/runtime/full_text/default_tokenizer.cpp:25:
src/runtime/full_text/icu_tokenizer.h:56:27: error: unknown type name 'RuleBasedBreakIterator'; did you mean 'icu::RuleBasedBreakIterator'?

typedef std::unique_ptr<RuleBasedBreakIterator> rbbi_ptr;
                        ^~~~~~~~~~~~~~~~~~~~~~
                        icu::RuleBasedBreakIterator

/usr/local/include/unicode/rbbi.h:53:20: note: 'icu::RuleBasedBreakIterator' declared here
class U_COMMON_API RuleBasedBreakIterator /*U_FINAL*/ : public BreakIterator {

^

https://ssl.icu-project.org/trac/changeset/40705

PR: 227042
Reported by: antoine (via exp-run)