Move gradle signing code out of allprojects

because it caused asking for the key passphrase multiple times, i.e. for
every subproject.

build.gradle

@@ -34,8 +34,11 @@ allprojects {
 				   'Bundle-Version': version)
 	}
 
+}
+
 gradle.taskGraph.whenReady { taskGraph ->
-		if (signingRequired && taskGraph.allTasks.any { it instanceof Sign }) {
+	if (signingRequired
+		&& taskGraph.allTasks.any { it instanceof Sign }) {
 		// Use Java 6's console to read from the console (no good for a CI environment)
 		Console console = System.console()
 		console.printf '\n\nWe have to sign some things in this build.\n\nPlease enter your signing details.\n\n'
@@ -46,7 +49,6 @@ allprojects {
 		console.printf '\nThanks.\n\n'
 	}
 }
-}
 
 task javadocAll(type: Javadoc) {
 	source subprojects.collect {project ->