NormalizationTest.txt additions

[markusicu]

I stumbled over an email from 2017 that I sent to @macchiati asking how & where to track stuff like this. Well, now we have an issue tracker here...

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Email body minus the where-to-track question:

These test cases exposed bugs in ICU normalization boundary detection that would have caused bad normalized strings in ICU 60:

http://bugs.icu-project.org/trac/changeset/40355#file10

Also, Jim found strings for which the old Google normalization code did not work right. They would probably be good for adding to the test data too. I can help you dig those up.

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That SVN/Trac commit from 2017-aug-25 was migrated to GitHub as
unicode-org/icu@2f87cf4

ICU-10524 normalization one-way mapping with trailing ccc>1 has no compose-boundary-after

X-SVN-Rev: 40355

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I assume that "file10" was either the C++ or Java test code file adding the TestComposeBoundaryAfter() function.

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I am not sure that I can still figure out the set of “strings for which the old Google normalization code did not work right”.