WIP: change dir

Jenkinsfile

 node('lkeb-vm-test') {
 	stage('Init') {
 		tool 'CMake 3.8.0'
+		sh 'mkdir -p build'
 	}
 
 	timeout(45) {
-		stage('Checkout and build') {
-			checkout scm
-			sh 'mkdir -p build'
-			sh 'cd build'
-			sh "${ tool 'CMake 3.8.0' } ../SuperBuild"
-			sh 'make'
+		dir('build') {
+			stage('Checkout and build') {
+				checkout scm
+				sh "${ tool 'CMake 3.8.0' } ../SuperBuild"
+				sh 'make'
+			}
 		}
 	}