package/freerdp: security bump to version 2.1.0

- Drop patch (already in version)
- Fix multiple CVEs: CVE-2020-11039, CVE-2020-11038, CVE-2020-11043,
  CVE-2020-11040, CVE-2020-11041, CVE-2020-11019, CVE-2020-11017,
  CVE-2020-11018
- Fix multiple leak and crash issues (#6129, #6128, #6127, #6110, #6081,
  #6077)

Extracted from:
https://github.com/FreeRDP/FreeRDP/commit/65d3ff44617c5a343f726985ed45e3a0a35dfaf3



Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>