Merge pull request MinecraftForge#480 from liachmodded/fix/replacement-data

Fixes incompatibility with gradle of version 4.4.1 and above

Author: LexManos

src/main/java/net/minecraftforge/gradle/user/UserBasePlugin.java

@@ -902,7 +902,7 @@ protected void makeRunTasks()
             JavaExec exec = makeTask("runClient", JavaExec.class);
             exec.getOutputs().dir(delayedFile(REPLACE_RUN_DIR));
             exec.setMain(GRADLE_START_CLIENT);
-            exec.workingDir(delayedFile(REPLACE_RUN_DIR));
+            exec.doFirst(task -> ((JavaExec) task).workingDir(delayedFile(REPLACE_RUN_DIR)));
             exec.setStandardOutput(System.out);
             exec.setErrorOutput(System.err);
 
@@ -919,7 +919,7 @@ protected void makeRunTasks()
             JavaExec exec = makeTask("runServer", JavaExec.class);
             exec.getOutputs().dir(delayedFile(REPLACE_RUN_DIR));
             exec.setMain(GRADLE_START_SERVER);
-            exec.workingDir(delayedFile(REPLACE_RUN_DIR));
+            exec.doFirst(task -> ((JavaExec) task).workingDir(delayedFile(REPLACE_RUN_DIR)));
             exec.setStandardOutput(System.out);
             exec.setStandardInput(System.in);
             exec.setErrorOutput(System.err);