Drop package facades:

- update incremental compilation tests

jps-plugin/testData/incremental/pureKotlin/multiplePackagesModified/build.log

@@ -1,7 +1,6 @@
 Cleaning output files:
 out/production/module/META-INF/module.kotlin_module
 out/production/module/b/B2Kt.class
-out/production/module/b/BPackage.class
 End of files
 Compiling files:
 src/a2.kt
@@ -9,9 +8,7 @@ End of files
 Cleaning output files:
 out/production/module/META-INF/module.kotlin_module
 out/production/module/a/A1Kt.class
-out/production/module/a/APackage.class
 out/production/module/b/B1Kt.class
-out/production/module/b/BPackage.class
 End of files
 Compiling files:
 src/a1.kt