Move visibility check for toplevel private declarations to Visibilities.PRIVATE and fix it.

Original commit: a36e4abf4d

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

@@ -0,0 +1,19 @@
+Cleaning output files:
+out/production/module/META-INF/module.kotlin_module
+out/production/module/test/TestPackage.class
+out/production/module/test/UsageKt.class
+End of files
+Compiling files:
+src/usage.kt
+End of files
+COMPILATION FAILED
+Cannot access 'foo': it is 'private' in file
+
+
+Cleaning output files:
+out/production/module/test/FooKt.class
+End of files
+Compiling files:
+src/foo.kt
+src/usage.kt
+End of files

jps/jps-plugin/testData/incremental/pureKotlin/topLevelPrivateValUsageAdded/foo.kt

@@ -0,0 +1,3 @@
+package test
+
+private fun foo() = 1

jps/jps-plugin/testData/incremental/pureKotlin/topLevelPrivateValUsageAdded/usage.kt

@@ -0,0 +1,4 @@
+package test
+
+fun usage() {
+}

jps/jps-plugin/testData/incremental/pureKotlin/topLevelPrivateValUsageAdded/usage.kt.new.1

@@ -0,0 +1,5 @@
+package test
+
+fun usage() {
+    println(foo())
+}

jps/jps-plugin/testData/incremental/pureKotlin/topLevelPrivateValUsageAdded/usage.kt.new.2

@@ -0,0 +1,4 @@
+package test
+
+fun usage() {
+}