Add a JVM backend debug information test, this commit is for verifying

line numbers for stepping.

Running JVM instance and read stepping events from it to verify with the
test data.

compiler/testData/debug/stepping/functionInAnotherFile.kt

@@ -0,0 +1,38 @@
+//FILE: foo.kt
+import bar
+fun foo(x: Int): Int {
+    if (x >= 0) {   // 4
+        return x    // 5
+    }
+    return bar(x)   // 7
+}
+
+//FILE: test.kt
+import foo
+fun box() {
+    foo(-3)            //4
+}
+
+fun bar(x: Int) =
+    if (x < 0) {           //8
+        foo(0)
+    } else {               // 10
+        foo(x)
+    }
+
+// IGNORE_BACKEND: JVM_IR
+
+// IR backend has bar().12 replaced as bar().8 for returning bar() function result.
+// LINENUMBERS
+// TestKt.box():4
+// FooKt.foo(int):4
+// FooKt.foo(int):7
+// TestKt.bar(int):8
+// TestKt.bar(int):9
+// FooKt.foo(int):4
+// FooKt.foo(int):5
+// TestKt.bar(int):9
+// TestKt.bar(int):12
+// FooKt.foo(int):7
+// TestKt.box():4
+// TestKt.box():5