[issue19518] Add new PyRun_xxx() functions to not encode the filename

[Serhiy Storchaka]

Changes by Serhiy Storchaka <storchaka at gmail.com>:


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components: +Interpreter Core
stage:  -> test needed
type:  -> enhancement

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue19518>
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