chore: Add license headers for python config files (#167)

Source-Author: Anthonios Partheniou <partheniou@google.com>
Source-Date: Tue Apr 6 11:32:03 2021 -0400
Source-Repo: googleapis/synthtool
Source-Sha: 5b5bf6d519b2d658d9f2e483d9f6f3d0ba8ee6bc
Source-Link: https://github.com/googleapis/synthtool/commit/5b5bf6d519b2d658d9f2e483d9f6f3d0ba8ee6bc
diff --git a/synth.metadata b/synth.metadata
index a51aef9..c66286d 100644
--- a/synth.metadata
+++ b/synth.metadata
@@ -4,14 +4,14 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/python-api-core.git",
-        "sha": "9eaa7868164a7e98792de24d2be97f79fba22322"
+        "sha": "49c6755a21215bbb457b60db91bab098185b77da"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "f5c5904fb0c6aa3b3730eadf4e5a4485afc65726"
+        "sha": "5b5bf6d519b2d658d9f2e483d9f6f3d0ba8ee6bc"
       }
     }
   ],