add sonar code checking

build.gradle

 ext.jadxVersion = file('version').readLines().get(0)
 
+apply plugin: 'sonar-runner'
+
 subprojects {
     apply plugin: 'java'
     apply plugin: 'idea'

jadx-samples/build.gradle

@@ -13,6 +13,10 @@ compileJava {
     options.compilerArgs << '-g:none'
 }
 
+sonarRunner {
+    skipProject = true
+}
+
 task samplesRun(type: JavaExec, dependsOn: compileJava) {  
     classpath = sourceSets.main.output
     main = mainSamplesClass