File maven4.patch of Package javapackages-tools

--- javapackages-6.3.4/java-utils/mvn_build.py	2025-07-02 11:53:09.701403170 +0200
+++ javapackages-6.3.4/java-utils/mvn_build.py	2025-07-02 11:58:57.193435529 +0200
@@ -176,6 +176,8 @@
                                optional=True)
         xc.add_package_mapping(Artifact.from_mvn_str(":{*}"), "@1")
 
+    if not os.path.exists(".mvn"):
+        os.makedirs(".mvn")
     print("Executing:", " ".join(mvn_args), file=sys.stderr)
     print(mvn_args, file=sys.stderr)
     sys.stderr.flush()