Fix file modes in binary release files

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=146256183

Change-Id: I63f05bea1bd31ddf1f578f6bdd60e3e0d1d33fc8

BUILD

@@ -20,10 +20,16 @@ pkg_tar(
         "//provisioning_sdk/public:binary_release_files",
         "//provisioning_sdk/public/python:binary_release_files",
     ],
+    mode = "0644",
+    modes = {
+        "example/provisioning_message_generator": "0755",
+        "run_tests.sh": "0755",
+    },
 )
 
 pkg_tar(
     name = "provisioning_sdk-bin",
     deps = [":provisioning_sdk_files"],
     files = ["//provisioning_sdk/public:libprovisioning_sdk.so"],
+    mode = "0755",
 )