Implement support for non-kts scripts in gradle

#KT-26784 fixed

plugins/scripting/scripting-cli/build.gradle.kts

@@ -14,6 +14,7 @@ dependencies {
     compileOnly(project(":compiler:cli"))
     compile(project(":kotlin-scripting-common"))
     compile(project(":kotlin-scripting-jvm"))
+    compile(project(":kotlin-stdlib"))
     compileOnly(project(":kotlin-reflect-api"))
     compileOnly(intellijCoreDep()) { includeJars("intellij-core") }
     compileOnly(intellijDep()) { includeJars("asm-all") }
@@ -34,6 +35,14 @@ sourceSets {
     "test" { projectDefault() }
 }
 
+tasks.withType<org.jetbrains.kotlin.gradle.dsl.KotlinCompile<*>> {
+    kotlinOptions {
+        languageVersion = "1.2"
+        apiVersion = "1.2"
+        freeCompilerArgs += "-Xskip-metadata-version-check"
+    }
+}
+
 val jar = runtimeJar {
     from(fileTree("$projectDir/src")) { include("META-INF/**") }
 }