fix CI.

common.gradle

@@ -53,4 +53,27 @@ task createFolders(description: 'Creates the source folders if they do not exist
             srcDir.mkdirs()
         }
     }
+}
+
+task makeExecutable(dependsOn: jar) << {
+    ext {
+        jar.classifier = ''
+        makeExecutableinjar = jar.archivePath
+        jar.classifier = ''
+        makeExecutableoutjar = jar.archivePath
+        jar.classifier = ''
+    }
+    def loc = new File(project.buildDir, "libs/" + makeExecutableoutjar.getName().substring(0, makeExecutableoutjar.getName().length()-4)+".exe")
+    def fos = new FileOutputStream(loc)
+    def is = new FileInputStream(new File(project.buildDir, '../HMCLauncher.exe'))
+    int read
+    def bytes = new byte[8192]
+    while((read = is.read(bytes)) != -1)
+        fos.write(bytes, 0, read);
+    is.close()
+    is = new FileInputStream(makeExecutableinjar)
+    while((read = is.read(bytes)) != -1)
+        fos.write(bytes, 0, read);
+    is.close()
+    fos.close()
 }