SI-6443 Expand test coverage with varargs, by-name.

These were already working, due to a serendipitous
ordering of transformations. The tests will keep
it this way.

Author: retronym

test/files/run/t6443-by-name.check

@@ -0,0 +1,3 @@
+1
+foo
+foo

test/files/run/t6443-by-name.scala

@@ -0,0 +1,18 @@
+object Test {
+
+	def main(args: Array[String]) {
+		def foo = {println("foo"); 0}
+		lazyDep(X)(foo)
+	}
+
+  trait T {
+  	type U
+  }
+  object X extends T { type U = Int }
+
+	def lazyDep(t: T)(u: => t.U) {
+		println("1")
+		u
+		u
+	}
+}

test/files/run/t6443-varargs.check

@@ -0,0 +1 @@
+foo

test/files/run/t6443-varargs.scala

@@ -0,0 +1,16 @@
+object Test {
+
+	def main(args: Array[String]) {
+		def foo = {println("foo"); 0}
+		lazyDep(X)(foo)
+	}
+
+  trait T {
+  	type U
+  }
+  object X extends T { type U = Int }
+
+	def lazyDep(t: T)(us: t.U*) {
+		List(us: _*)
+	}
+}