Allow for reproducible builds

REPRODUCIBLE_BUILD=1 ./gradlew clean :build

gradle/reprod/patches/replaymod/0002-Replace-mixin-dep-with-manually-built-one.patch

@@ -0,0 +1,27 @@
+From 9e4e7ac3f8ee5508939cf71e731189e4c0e1c7b5 Mon Sep 17 00:00:00 2001
+From: Jonas Herzig <me@johni0702.de>
+Date: Tue, 8 Aug 2017 20:06:39 +0200
+Subject: [PATCH 2/5] Replace mixin dep with manually built one
+
+---
+ build.gradle | 4 +---
+ 1 file changed, 1 insertion(+), 3 deletions(-)
+
+diff --git a/build.gradle b/build.gradle
+index 42d0607..bfa3914 100755
+--- a/build.gradle
++++ b/build.gradle
+@@ -41,9 +41,7 @@ configurations {
+ dependencies {
+     compile 'org.projectlombok:lombok:1.16.4'
+ 
+-    compile('org.spongepowered:mixin:0.6.11-SNAPSHOT') {
+-        exclude group: 'org.apache.logging.log4j'
+-    }
++    shade files('gradle/reprod/deps/mixin.jar')
+     shade 'com.googlecode.mp4parser:isoparser:1.1.7'
+     shade 'org.apache.commons:commons-exec:1.3'
+     shade 'com.google.apis:google-api-services-youtube:v3-rev178-1.22.0'
+-- 
+2.5.5
+