$ file compilerplugins/clang/singlevalfields.results -i

Before:
    compilerplugins/clang/singlevalfields.results: application/octet-stream; charset=binary

After:
    compilerplugins/clang/singlevalfields.results: text/x-c; charset=iso-8859-1

Then converted to UTF-8, to avoid troubles reading it with Python/Editors without
forcing latin-1, like this:

UnicodeDecodeError('utf-8', b'    SwWW8ImplReader::Read_F_DocInfo aName41
    ZULETZTGEDRUCKT
sw/source/filter/ww8/ww8par5.cxx:1569
    SwWW8ImplReader::Read_F_DocInfo aName42
    DERNI\xc8REIMPRESSION
', 155, 156, 'invalid continuation byte')

See here:
https://stackoverflow.com/questions/5552555/unicodedecodeerror-invalid-continuation-byte

Change-Id: Ie54c25e069b3f12b6a28e3724f5b2d323f26f737
Reviewed-on: https://gerrit.libreoffice.org/64786
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>