Add pipeline script for multiplatform build.

Builds Linux and Windows versions in parallel.

Signed-off-by: Lev Stipakov <lev@openvpn.net>

Jenkinsfile

@@ -0,0 +1,44 @@
+def checkout() {
+    step([$class: 'WsCleanup'])
+    checkout([
+        $class: 'GitSCM',
+        branches: [[name: '*/${BRANCH}']],
+        extensions: [[$class: 'RelativeTargetDirectory', relativeTargetDir: 'core']], 
+        userRemoteConfigs: [[credentialsId: 'jenkins', url: 'git@bitbucket.org:openvpntechnologies/ovpn3-core.git']]
+    ])
+}
+
+def build_linux() {
+    checkout() 
+    withEnv(["O3=$WORKSPACE"]) {
+        dir("$O3/core/test/ovpncli") {
+            sh 'ECHO=1 PROF=linux ASIO_DIR=~/asio MTLS_SYS=1 LZ4_SYS=1 NOSSL=1 $O3/core/scripts/build cli'
+        }
+    }
+    archiveArtifacts 'core/test/ovpncli/cli'
+}
+
+def build_windows() {
+    checkout()
+    dir('core\\win') {
+        bat 'copy c:\\Jenkins\\parms_local.py'        
+        bat 'python buildep.py'
+        bat 'python build.py'
+    }
+    archiveArtifacts 'core/win/cli.exe,core/win/cli.obj'
+}
+
+stage('Build') {
+    parallel(
+        linux: {
+            node('linux_slave') {
+                build_linux()          
+            }
+        },
+        windows: {
+            node('windows_slave') {
+                build_windows()
+            }
+        }
+    )    
+}