Add tests-spec module with basic gradle configuration

compiler/tests-spec/build.gradle.kts

@@ -0,0 +1,17 @@
+plugins {
+    kotlin("jvm")
+    id("jps-compatible")
+}
+
+dependencies {
+    testCompile(projectTests(":compiler"))
+}
+
+sourceSets {
+    "main" { }
+    "test" { projectDefault() }
+}
+
+projectTest {
+    workingDir = rootDir
+}

settings.gradle

@@ -132,6 +132,7 @@ include ":kotlin-build-common",
         ":kotlin-reflect-api",
         ":kotlin-ant",
         ":compiler:tests-java8",
+        ":compiler:tests-spec",
         ":generators",
         ":generators:test-generator",
         ":tools:binary-compatibility-validator",