fixes to use Gradle 4.7 and workaround for env variables on 4.7 gradle - use -P in Gradle commandline instead

Author: jonnyzzz

tutorials/mpp-iOS-Android/SharedCode/build.gradle

@@ -31,7 +31,7 @@ configurations {
 
 task packForXCode(type: Sync) {
     final File frameworkDir = new File(buildDir, "xcode-frameworks")
-    final String mode = System.getenv('CONFIGURATION')?.toUpperCase() ?: 'DEBUG'
+    final String mode = project.findProperty("XCODE_CONFIGURATION")?.toUpperCase() ?: 'DEBUG'
 
     inputs.property "mode", mode
     dependsOn kotlin.targets.iOS.compilations.main.linkTaskName("FRAMEWORK", mode)

tutorials/mpp-iOS-Android/build.gradle

@@ -1,7 +1,7 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = '1.3.0-rc-57'
+    ext.kotlin_version = '1.3.0-rc-190'
     repositories {
         google()
         jcenter()

tutorials/mpp-iOS-Android/native/KotlinIOS/KotlinIOS.xcodeproj/project.pbxproj

@@ -168,7 +168,7 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "\ncd $SRCROOT/../../SharedCode/build/xcode-frameworks\n./gradlew :SharedCode:packForXCode\n";
+			shellScript = "\ncd $SRCROOT/../../SharedCode/build/xcode-frameworks\n./gradlew :SharedCode:packForXCode  -PXCODE_CONFIGURATION=${CONFIGURATION}\n";
 		};
 /* End PBXShellScriptBuildPhase section */