RIOT: update for 2020.07

miri64 · miri64 · commit e48674128f85 · 2020-07-27T13:44:51.000+02:00
diff --git a/RIOT b/RIOT
@@ -1 +1 @@
-Subproject commit 673187e29c06cdba74f0b82c7b30b9de2538531f
+Subproject commit 398a06655298a8c705f2bc35aab6703b2c50debd
