Don't consider a directory to be a package if there's a .java or .class file with the same name in its parent directory

#KT-12664 Fixed

compiler/testData/compileKotlinAgainstCustomBinaries/innerClassPackageConflict/library/test/Foo.java

@@ -0,0 +1,7 @@
+package test;
+
+public class Foo {
+    public interface Bar {
+
+    }
+}

compiler/testData/compileKotlinAgainstCustomBinaries/innerClassPackageConflict/output.txt

@@ -0,0 +1 @@
+OK

compiler/testData/compileKotlinAgainstCustomBinaries/innerClassPackageConflict/source.kt

@@ -0,0 +1,3 @@
+import test.Foo.Bar
+
+val f: Bar? = null