update golang.org/x/crypto (#3392)

Update Gopkg.lock via dep ensure --update golang.org/x/crypto

see #3391 (comment) (nothing to review here really).

Gopkg.lock

@@ -369,7 +369,8 @@
   version = "v0.14.1"
 
 [[projects]]
-  digest = "1:00d2b3e64cdc3fa69aa250dfbe4cc38c4837d4f37e62279be2ae52107ffbbb44"
+  branch = "master"
+  digest = "1:f4edb30d5ff238e2abba10457010f74cd55ae20bbda8c54db1a07155fa020490"
   name = "golang.org/x/crypto"
   packages = [
     "bcrypt",
@@ -390,7 +391,7 @@
     "salsa20/salsa",
   ]
   pruneopts = "UT"
-  revision = "505ab145d0a99da450461ae2c1a9f6cd10d1f447"
+  revision = "8dd112bcdc25174059e45e07517d9fc663123347"
 
 [[projects]]
   digest = "1:d36f55a999540d29b6ea3c2ea29d71c76b1d9853fdcd3e5c5cb4836f2ba118f1"