Use the latest skia

2017-02-16 21:39:57 +02:00 · 2017-02-16 21:39:57 +02:00 · a637922aa5
--- a/externals/skia
+++ b/externals/skia
@ -1 +1 @@
-Subproject commit 13849e529c7b3c116e077b479e83e67b8c5ab5a4
+Subproject commit 1daf9781faba0f10188d03b0510a16fa2ac4bf6d