Add a test for SMAPs with interleaved files

compiler/testData/codegen/boxInline/smap/interleavedFiles.kt

@@ -0,0 +1,60 @@
+// FILE: 1.kt
+package test
+
+inline fun f() {}
+
+// FILE: 2.kt
+import test.*
+
+inline fun g() {}
+
+inline fun h() {
+    f() // line N+1 -> 1.kt:4
+    g() // line N+2 -> 2.kt:4
+    f() // line N+3 -> 1.kt:4 again
+}
+
+fun box(): String {
+    h()
+    return "OK"
+}
+
+// FILE: 1.smap
+
+// FILE: 2.smap
+SMAP
+2.kt
+Kotlin
+*S Kotlin
+*F
++ 1 2.kt
+_2Kt
++ 2 1.kt
+test/_1Kt
+*L
+1#1,17:1
+4#1:19
+7#1:21
+8#1:23
+4#1,6:24
+10#1:31
+4#2:18
+4#2:20
+4#2:22
+4#2:30
+*E
+*S KotlinDebug
+*F
++ 1 2.kt
+_2Kt
+*L
+8#1:19
+13#1:21
+13#1:23
+13#1,6:24
+13#1:31
+7#1:18
+9#1:20
+13#1:22
+13#1:30
+*E