Romain Vimont 3b17ff7c86 Add functions to convert wide char to UTF-8
There was already utf8_to_wide_char(), used to correctly execute
commands on Windows.

Add the reverse converter: utf8_from_wide_char(). We will need it to
build the scrcpy-server path based on the executable directory.
2019-06-11 17:44:07 +02:00
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