Allow for reproducible builds

REPRODUCIBLE_BUILD=1 ./gradlew clean :build

gradle/reprod/patches/mixin/0003-Fix-for-Gradle-3.patch

@@ -0,0 +1,25 @@
+From 0f250141ba6515dbeffeb0722bf29976850bb323 Mon Sep 17 00:00:00 2001
+From: Jonas Herzig <me@johni0702.de>
+Date: Tue, 8 Aug 2017 19:13:17 +0200
+Subject: [PATCH 3/7] Fix for Gradle 3
+
+---
+ build.gradle | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/build.gradle b/build.gradle
+index 165dbe4..0f189ec 100644
+--- a/build.gradle
++++ b/build.gradle
+@@ -92,7 +92,7 @@ dependencies {
+ 
+ // Task to read ASM library and rename packages
+ task renamedASM {
+-    outputs.file files(configurations.asm.files.findAll{!it.name.contains("sources")}.collect { file ->
++    outputs.files files(configurations.asm.files.findAll{!it.name.contains("sources")}.collect { file ->
+         new File(project.repositories['renamed-packages'].dirs[0], "mixin-" + file.name).path
+     })
+     doLast {
+-- 
+2.5.5
+