Build binaries for various platforms in CI (#301)

Provides a Jenkinsfile and enables automatic builds of status-go binaries for various platforms and deploys them to the artifacts manager.

Jenkinsfile

@@ -0,0 +1,70 @@
+#!/usr/bin/env groovy
+
+@NonCPS
+def getVersion(branch, sha) {
+    if (sha?.trim()) {
+        return branch.replaceAll(/\//, '-') + '-' + sha
+    }
+
+    return branch.replaceAll(/\//, '-')
+}
+
+node {
+    checkout scm
+
+    def remoteOriginRegex = ~/^remotes\/origin\//
+
+    gitSHA = sh(returnStdout: true, script: 'git rev-parse HEAD').trim()
+    gitShortSHA = gitSHA.take(7)
+    gitBranch = sh(returnStdout: true, script: 'git name-rev --name-only HEAD').trim() - remoteOriginRegex
+
+    stage('Debug') {
+        sh 'env'
+        println(gitBranch)
+        println(gitSHA)
+    }
+
+    // TODO(adam): enable when unit tests start passing
+    // stage('Test') {
+    //     sh 'make ci'
+    // }
+
+    stage('Build') {
+        parallel (
+            'statusgo-android': {
+                sh 'make statusgo-android'
+            },
+            'statusgo-ios-simulator': {
+                sh '''
+                    make statusgo-ios-simulator
+                    cd build/bin/statusgo-ios-9.3-framework/
+                    zip -r status-go-ios.zip Statusgo.framework
+                '''
+            }
+        )
+    }
+
+    stage('Deploy') {
+        // For branch builds, replace the old artifact. For develop keep all of them.
+        def version = gitBranch == 'develop' ? getVersion(gitBranch, gitShortSHA) : getVersion(gitBranch, '')
+        def server = Artifactory.server 'artifactory'
+        def uploadSpec = """{
+            "files": [
+                {
+                    "pattern": "build/bin/statusgo-android-16.aar",
+                    "target": "libs-release-local/status-im/status-go/${version}/status-go-${version}.aar"
+                },
+                {
+                    "pattern": "build/bin/statusgo-ios-9.3-framework/status-go-ios.zip",
+                    "target": "libs-release-local/status-im/status-go-ios-simulator/${version}/status-go-ios-simulator-${version}.zip"
+                }
+            ]
+        }"""
+
+        def buildInfo = Artifactory.newBuildInfo()
+        buildInfo.env.capture = false
+        buildInfo.name = 'status-go'
+        server.upload(uploadSpec, buildInfo)
+        server.publishBuildInfo(buildInfo)
+    }
+}