chore(vendor): upgrade jsonite rev (#1011)

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>

vendor/vendor.json

@@ -34,10 +34,10 @@
 			"revisionTime": "2017-06-01T23:02:30Z"
 		},
 		{
-			"checksumSHA1": "bgb/lk2wroBJ5z+JI2xnVj7WkwI=",
+			"checksumSHA1": "1K394KhUNPplCZzaz69+az17fR0=",
 			"path": "github.com/json-iterator/go",
-			"revision": "845d8438db34cc782608bbee7647a522b4e87de0",
-			"revisionTime": "2017-07-10T17:07:18Z"
+			"revision": "dc388588a371d252dabef1f758e53a958fa11726",
+			"revisionTime": "2017-07-12T08:40:14Z"
 		},
 		{
 			"checksumSHA1": "9if9IBLsxkarJ804NPWAzgskIAk=",