chromium: 66.0.3359.139 -> 66.0.3359.170

Update includes 4 security fixes, including one critical (see [0]):

* [835887] Critical: Chain leading to sandbox escape. Reported by Anonymous on 2018-04-23:
* [836858] High CVE-2018-6121: Privilege Escalation in extensions.
* [836141] High CVE-2018-6122: Type confusion in V8.
* [$5000][833721] High CVE-2018-6120: Heap buffer overflow in PDFium.  Reported by Zhou Aiting(@zhouat1) of Qihoo 360 Vulcan Team on 2018-04-17

[0] https://chromereleases.googleblog.com/2018/05/stable-channel-update-for-desktop.html

PS: Didn't build Beta and Dev, verified only Stable for now

cc @bendlas @aszlig

pkgs/applications/networking/browsers/chromium/upstream-info.nix

@@ -1,18 +1,18 @@
 # This file is autogenerated from update.sh in the same directory.
 {
   beta = {
-    sha256 = "136gx9qqbzfzaf19k0gxb8n4ypd4ycyr83i9v68nqdvy2k26vf4n";
-    sha256bin64 = "0w628afj5k4xygizlznwxkljgc1prxqc3lanaz6gdmyrl7gk1s7n";
-    version = "67.0.3396.18";
+    sha256 = "169lxj6rhpqcnrg3n2api82975hkifz6wmks1bh04jkxw0z2vkny";
+    sha256bin64 = "1hd4s35yhi2xidy3xncp66p03cv715bzbf3gcv5dl0d1h3nmhhdf";
+    version = "67.0.3396.40";
   };
   dev = {
-    sha256 = "1yspf0n385ail9qxsmax58mfk5yi473ygsraqs83q30pfgxc5z2f";
-    sha256bin64 = "1gi1xpnjwkg7sxv94ksv6fiymw13rxdq2hyvza8b9famvfcaz07j";
-    version = "68.0.3409.2";
+    sha256 = "0j4vcfbdj8cvdsmnb6pz0k71w559rm3ka1yyv0yfq7f756hinpvp";
+    sha256bin64 = "1qqhyjdd227psvr904w3d3lq47bfwmpk6f7sam2gp4j0wxn23w8w";
+    version = "68.0.3423.2";
   };
   stable = {
-    sha256 = "1ck4wbi28702p1lfs4sz894ysbgm7fj79wrqj8srsy65z2ssaxdy";
-    sha256bin64 = "1vgrgay3h0961vj96ql2p0pb16gzfr48r4hk25rxdqbflnz7njz0";
-    version = "66.0.3359.139";
+    sha256 = "1pki90vnc8amzdwagcsnkwnqnw4k442234x8wfc7cf0rkmjackc6";
+    sha256bin64 = "0a68w4p0dqxal7xh7nlfzsj7yl9xxp1bq3khfnpa3r7r38zbxnpw";
+    version = "66.0.3359.170";
   };
 }