meson: Disable building with freerdp1 as this no longer builds
../libweston/compositor-rdp.c: In function ‘rdp_peer_refresh_rfx’: ../libweston/compositor-rdp.c:213:25: error: invalid type argument of unary ‘*’ (have ‘SURFACE_BITS_COMMAND’ {aka ‘struct _SURFACE_BITS_COMMAND’}) memset(&cmd, 0, sizeof(*cmd));
We suggest using freerdp2 or disable rdp entirely.
Signed-off-by: Marius Vlad marius.vlad@collabora.com