Update abseil submodule to HEAD

stweil · stweil · commit bb226c19ab90 · 2019-05-17T15:03:43.000+02:00
Abseil suggests to use the latest code: https://abseil.io/about/philosophy#we-recommend-that-you-choose-to-live-at-head Signed-off-by: Stefan Weil <sw@weilnetz.de>
diff --git a/abseil b/abseil
@@ -1 +1 @@
-Subproject commit e821380d69a549dc64900693942789d21aa4df5e
+Subproject commit daf381e8535a1f1f1b8a75966a74e7cca63dee89
