Sync common CI files

Author: timfel

ci/common.jsonnet

@@ -269,9 +269,10 @@ local common_json = import "../common.json";
 
     graalpy:: self.gradle + self.cmake + {
       packages+: if (self.os == "linux") then {
-        libffi: '>=3.2.1',
-        bzip2: '>=1.0.6',
-        maven: ">=3.3.9",
+        libffi: '==3.2.1',
+        bzip2: '==1.0.6',
+        zlib: '==1.2.11',
+        maven: "==3.6.3",
       } else {},
     },
 

graal-common.json

@@ -1,6 +1,6 @@
 {
   "README": "This file contains definitions that are useful for the jsonnet CI files of the graal and graal-enterprise repositories.",
   "ci": {
-    "overlay": "ed6845f6ba14623db7c6e2f71f0ed9f6b0efb708"
+    "overlay": "ef05732d992d2f04c1f9824dcbf7b02f5034b614"
   }
 }