[tracker-miners] meson: Link to seccomp README for list of supported archs

[Sam Thursfield <sthursfield src gnome org>]

commit 87458f6cceed415a359de4e7574fad5c184e3768
Author: Sam Thursfield <sam afuera me uk>
Date:   Sun Feb 17 15:59:52 2019 +0100

    meson: Link to seccomp README for list of supported archs
    
    See discussion at https://gitlab.gnome.org/GNOME/tracker-miners/merge_requests/51#note_438919

 meson.build | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/meson.build b/meson.build
index 0ba892a7b..4dc9cecf9 100644
--- a/meson.build
+++ b/meson.build
@@ -255,6 +255,9 @@ endif
 
 host_system = host_machine.system()
 host_cpu = host_machine.cpu()
+
+# You can find a list of architectures that seccomp supports in the seccomp
+# project README. See: https://github.com/seccomp/libseccomp/
 unsupported_cpus = [
   'alpha',
   'ia64',
@@ -265,6 +268,7 @@ unsupported_cpus = [
   'sparc',
   'sparc64',
 ]
+
 system_supports_seccomp = host_system == 'linux'
 cpu_supports_seccomp = not unsupported_cpus.contains(host_cpu)
 seccomp_required = system_supports_seccomp and cpu_supports_seccomp