Jenkins add Android release build

Jenkinsfile

@@ -4,6 +4,31 @@ pipeline {
     stage('build') {
       parallel {
 
+        stage('Android Release') {
+          environment {
+            CCACHE_BASEDIR = "${env.WORKSPACE}"
+            QGC_CONFIG = 'release'
+            QMAKE_VER = "5.9.2/android_armv7/bin/qmake"
+          }
+          agent {
+            docker {
+              image 'mavlink/qgc-build-android:2018-04-14'
+              args '-v ${CCACHE_DIR}:${CCACHE_DIR}:rw'
+            }
+          }
+          steps {
+            sh 'export'
+            sh 'ccache -z'
+            sh 'git submodule deinit -f .'
+            sh 'git clean -ff -x -d .'
+            sh 'git submodule update --init --recursive --force'
+            sh 'mkdir build; cd build; ${QT_PATH}/${QMAKE_VER} -r ${WORKSPACE}/qgroundcontrol.pro CONFIG+=${QGC_CONFIG} CONFIG+=WarningsAsErrorsOn'
+            sh 'cd build; make -j`nproc --all`'
+            sh 'ccache -s'
+            sh 'git clean -ff -x -d .'
+          }
+        }
+
         stage('Linux Debug') {
           environment {
             CCACHE_BASEDIR = "${env.WORKSPACE}"
@@ -25,6 +50,7 @@ pipeline {
             sh 'mkdir build; cd build; ${QT_PATH}/${QMAKE_VER} -r ${WORKSPACE}/qgroundcontrol.pro CONFIG+=${QGC_CONFIG} CONFIG+=WarningsAsErrorsOn'
             sh 'cd build; make -j`nproc --all`'
             sh 'ccache -s'
+            sh 'git clean -ff -x -d .'
           }
         }
 
@@ -49,6 +75,7 @@ pipeline {
             sh 'mkdir build; cd build; ${QT_PATH}/${QMAKE_VER} -r ${WORKSPACE}/qgroundcontrol.pro CONFIG+=${QGC_CONFIG} CONFIG+=WarningsAsErrorsOn'
             sh 'cd build; make -j`nproc --all`'
             sh 'ccache -s'
+            sh 'git clean -ff -x -d .'
           }
         }
 
@@ -72,6 +99,7 @@ pipeline {
             sh 'mkdir build; cd build; ${QT_PATH}/${QMAKE_VER} -r ${WORKSPACE}/qgroundcontrol.pro CONFIG+=${QGC_CONFIG} CONFIG+=WarningsAsErrorsOn'
             sh 'cd build; make -j`sysctl -n hw.ncpu`'
             sh 'ccache -s'
+            sh 'git clean -ff -x -d .'
           }
         }
 
@@ -96,6 +124,7 @@ pipeline {
             sh 'cd build; make -j`sysctl -n hw.ncpu`'
             sh 'ccache -s'
             archiveArtifacts(artifacts: 'build/**/*.dmg', fingerprint: true, onlyIfSuccessful: true)
+            sh 'git clean -ff -x -d .'
           }
         }