Fix compilation problems with latest version of FreeRDP/FreeRDP master

Library names have been completely renamed into FreeRDP/FreeRDP master
branch. This commit updates Remmina's cmake files according new names.
Merge remote-tracking branch 'upstream/gtk3' into gtk3
Merge remote-tracking branch 'upstream/gtk3' into gtk3
Merge pull request #326 from giox069/gtk3

Fix compilation problems with latest version of FreeRDP/FreeRDP master
Merge branch 'FreeRDP-gtk3'