Fix maven sign error #2.

Author: bladecoder

blade-engine-spine-plugin/build.gradle

@@ -1,7 +1,7 @@
 apply plugin: "java"
 apply plugin: 'java-library'
-apply plugin: "maven"
 apply plugin: "signing"
+apply plugin: "maven"
 
 group = 'com.bladecoder.engine'
 
@@ -52,7 +52,7 @@ task sourcesJar(type: Jar) {
 }
 
 artifacts {
-    archives jar
+    //archives jar
     archives enginedocJar
     archives sourcesJar
 }

blade-engine/build.gradle

@@ -1,7 +1,7 @@
 apply plugin: 'java-library'
 apply plugin: "java"
-apply plugin: "maven"
 apply plugin: "signing"
+apply plugin: "maven"
 
 group = 'com.bladecoder.engine'