Native: move samples to backend.native/tests/

kotlin-native/backend.native/tests/samples/gradle.properties

@@ -0,0 +1,21 @@
+kotlin.code.style=official
+
+# Run parallel builds in Gradle:
+org.gradle.parallel=true
+org.gradle.workers.max=4
+
+# Pin Kotlin version:
+# CHANGE_VERSION_WITH_RELEASE
+kotlin_version=1.6.0
+
+# Sets maven path for the kotlin version other than release
+#kotlinCompilerRepo=
+
+# Use custom Kotlin/Native home:
+kotlin.native.home=../../dist
+
+# Increase memory for in-process compiler execution.
+org.gradle.jvmargs=-Xmx3g
+
+# Disable HMPP with metadata until KT-50547 is not fixed
+kotlin.mpp.hierarchicalStructureSupport=false