Add security SIG info and notes

Signed-off-by: Riyaz Faizullabhoy <riyaz.faizullabhoy@docker.com>

reports/sig-security/2017-05-24.md

@@ -0,0 +1,17 @@
+# 2017-05-24
+Video link: https://docker.zoom.us/j/779801882
+
+## Agenda
+- Introductions
+- Discuss goals of SIG
+- Updates on security `/projects`:
+  - clear-containers
+  - kernel-config
+  - kspp
+  - landlock
+  - miragesdk
+  - okernel
+  - wireguard
+- `hardened` channel proposal: combining multiple security `/projects` into one yml
+
+## Meeting Notes