[gnome-desktop] seccomp is not supported ATM on riscv64 architecture, blacklist it for now

[Michael Catanzaro <mcatanzaro src gnome org>]

commit f8916f70e7a9eb4364aee670b5c5657762473dc7
Author: Laurent Bigonville <bigon bigon be>
Date:   Thu Dec 5 10:31:10 2019 +0100

    seccomp is not supported ATM on riscv64 architecture, blacklist it for now
    
    Fixes: https://gitlab.gnome.org/GNOME/gnome-desktop/issues/128

 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index 360d6600..3f2260fe 100644
--- a/meson.build
+++ b/meson.build
@@ -58,7 +58,7 @@ udev_dep = dependency('libudev', required: get_option('udev'))
 host_os = host_machine.system()
 host_cpu = host_machine.cpu()
 supported_os = ['linux']
-unsupported_cpus = ['alpha', 'ia64', 'm68k', 'sh4', 'sparc', 'sparc64']
+unsupported_cpus = ['alpha', 'ia64', 'm68k', 'riscv64', 'sh4', 'sparc', 'sparc64']
 if supported_os.contains(host_os) and not unsupported_cpus.contains(host_cpu)
   seccomp_dep = dependency('libseccomp')
 else