Add initial Multi-Arch SIG meeting schedule

Depends-On: https://review.opendev.org/#/c/700098

Change-Id: Ibe19da52647893675fb6be354e79b878febbcf51

meetings/multi-arch-meeting.yaml

@@ -0,0 +1,20 @@
+project:  Multi-Arch SIG Meeting
+meeting_id: multi-arch
+agenda_url: https://etherpad.openstack.org/p/Multi-arch
+schedule:
+  - time:       '0800'
+    day:        Tuesday
+    irc:        openstack-meeting-alt
+    frequency:  biweekly-even
+    start_date: 20200107
+
+  - time:       '1500'
+    day:        Tuesday
+    irc:        openstack-meeting
+    frequency:  biweekly-even
+    start_date: 20200107
+chair:  Rico Lin (ricolin)
+description:  >
+  If you're interested in multi-arch support (for example like ARM support)
+  within OpenStack, we have regular meetings on IRC. Anyone is very welcome
+  to join.