build(java): readme.sh should be executable (#251)

Source-Author: Jeff Ching <[email protected]>
Source-Date: Wed Sep 30 13:20:04 2020 -0700
Source-Repo: googleapis/synthtool
Source-Sha: 0762e8ee2ec21cdfc4d82020b985a104feb0453b
Source-Link: googleapis/synthtool@0762e8e

Author: yoshi-automation

.kokoro/readme.sh

@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-vision.git",
-        "sha": "655167f8c7027b6321eb06042fb6bffe7790509e"
+        "sha": "2a7f8e7b0f191765fc09f9af766f142a8ceffe2a"
       }
     },
     {
@@ -51,7 +51,7 @@
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "8a7a3021fe97aa0a3641db642fe2b767f1c8110f"
+        "sha": "0762e8ee2ec21cdfc4d82020b985a104feb0453b"
       }
     }
   ],