Updated gradle build file

bclib.gradle

@@ -99,7 +99,7 @@ javadoc {
 }
 
 task javadocJar(type: Jar, dependsOn: javadoc) {
-    classifier = 'javadoc'
+    archiveClassifier = 'javadoc'
     from javadoc.destinationDir
 }
 
@@ -107,7 +107,7 @@ task javadocJar(type: Jar, dependsOn: javadoc) {
 // if it is present.
 // If you remove this task, sources will not be generated.
 task sourcesJar(type: Jar, dependsOn: classes) {
-    classifier = 'sources'
+    archiveClassifier = 'sources'
     from sourceSets.main.allSource
 }