Security update for freerdp

This update for freerdp fixes the following issues:

- CVE-2020-15103: Fix integer overflow due to missing input sanitation in rdpegfx channel (bsc#1174321).

This update was imported from the SUSE:SLE-15-SP1:Update update project.

Fixed bugs
bnc#1174321
VUL-0: CVE-2020-15103: freerdp: Integer overflow due to missing input sanitation in rdpegfx channel
Selected Binaries
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