Jenkins split MacOS builds into new pipeline

.ci/Jenkinsfile-compile_mac

@@ -0,0 +1,67 @@
+#!/usr/bin/env groovy
+
+pipeline {
+  agent none
+  stages {
+
+    stage('Build') {
+
+      parallel {
+
+        stage('px4_sitl_default (OSX)') {
+          agent {
+            label 'mac'
+          }
+          environment {
+            CCACHE_BASEDIR = "${env.WORKSPACE}"
+          }
+          steps {
+            sh 'export'
+            sh 'make distclean'
+            sh 'ccache -z'
+            sh 'make px4_sitl_default'
+            sh 'ccache -s'
+            sh 'make tests'
+          }
+          post {
+            always {
+              sh 'make distclean'
+            }
+          }
+        } // stage px4_sitl_default
+
+        stage('px4_fmu-v5_default (OSX)') {
+          agent {
+            label 'mac'
+          }
+          environment {
+            CCACHE_BASEDIR = "${env.WORKSPACE}"
+          }
+          steps {
+            sh 'export'
+            sh 'make distclean'
+            sh 'ccache -z'
+            sh 'make px4_fmu-v5_default'
+            sh 'ccache -s'
+          }
+          post {
+            always {
+              sh 'make distclean'
+            }
+          }
+        } // stage px4_fmu-v5_default
+
+      } // parallel
+    } // stage Build
+
+  } // stages
+  environment {
+    CCACHE_CPP2 = '1'
+    CCACHE_DIR = '/tmp/ccache'
+    CI = true
+  }
+  options {
+    buildDiscarder(logRotator(numToKeepStr: '5', artifactDaysToKeepStr: '14'))
+    timeout(time: 60, unit: 'MINUTES')
+  }
+}