Security update for freerdp

This update for freerdp fixes the following issues:

- CVE-2019-17177: Fixed multiple memory leaks in libfreerdp/codec/region.c (bsc#1153163).
- CVE-2019-17178: Fixed a memory leak in HuffmanTree_makeFromFrequencies (bsc#1153164).

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

Fixed bugs
bnc#1153163
VUL-0: CVE-2019-17177: freerdp: memory leaks in libfreerdp/codec/region.c
bnc#1153164
VUL-0: CVE-2019-17178: freerdp: memory leak in HuffmanTree_makeFromFrequencies in lodepng.c
Selected Binaries
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