Move gradle config for reproducible builds into init.gradle file

gradle/reprod/patches/mixingradle/0001-Configure-gradle-to-build-reproducible-archives.patch

@@ -1,30 +0,0 @@
-From 34446d49be65c3a17e962c2e4053ed3e41aa2ab4 Mon Sep 17 00:00:00 2001
-From: Jonas Herzig <me@johni0702.de>
-Date: Mon, 7 Aug 2017 20:04:25 +0200
-Subject: [PATCH 1/3] Configure gradle to build reproducible archives
-
----
- build.gradle | 5 +++++
- 1 file changed, 5 insertions(+)
-
-diff --git a/build.gradle b/build.gradle
-index 3127c7f..c34a8a2 100644
---- a/build.gradle
-+++ b/build.gradle
-@@ -71,6 +71,13 @@ task groovydocJar(type: Jar, dependsOn: groovydoc) {
-     classifier = 'groovydoc'
- }
- 
-+tasks.withType(AbstractArchiveTask) {
-+    preserveFileTimestamps = false
-+    reproducibleFileOrder = true
-+    dirMode = 0775
-+    fileMode = 0664
-+}
-+
- artifacts {
-     archives jar
-     archives groovydocJar
--- 
-2.5.5
-