JVM_IR: remember facade fqnames of imported classes

Necessary to support importing file classes annotated @JvmPackageName,
since the actual package fragment they are a part of has the name from
the `package` declaration.

compiler/testData/codegen/boxInline/jvmPackageName/simple.kt

@@ -1,5 +1,3 @@
-// IGNORE_BACKEND: JVM_IR
-// IGNORE_BACKEND_MULTI_MODULE: JVM_IR
 // TARGET_BACKEND: JVM
 // WITH_RUNTIME
 // FILE: 1.kt