Use workaround to fix many collation failures in ICU4C. #475
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Test generation in Python puts SMP characters (> 0xffff) as \ud8** surrogate pairs. This works OK for ICU4J, ICU4X, and NodeJS, but fails with the current CPP JSON.
This workaround adds two new items that contain the hex codes for the characters to be compared in s1 and s2. These are set for the NON_IGNORABLE and SHIFTED data files.
This is admittedly a hack, but it points out that the tests with SMP characters were not working. With this hack, over 1200 tests now pass that were previously failing.