JS backend: report diagnostic when try to get referenece on builtin members instead of crash with Exception.

compiler/testData/cli/js/diagnosticWhenReferenceToBuiltinsMember.args

@@ -0,0 +1,4 @@
+$TESTDATA_DIR$/diagnosticWhenReferenceToBuiltinsMember.kt
+-no-stdlib
+-output
+$TEMP_DIR$/out.js

compiler/testData/cli/js/diagnosticWhenReferenceToBuiltinsMember.kt

@@ -0,0 +1,6 @@
+package foo
+
+fun test() {
+    Int::toByte
+    String::length
+}

compiler/testData/cli/js/diagnosticWhenReferenceToBuiltinsMember.out

@@ -0,0 +1,5 @@
+WARNING: compiler/testData/cli/js/diagnosticWhenReferenceToBuiltinsMember.kt: (4, 5) The expression is unused
+ERROR: compiler/testData/cli/js/diagnosticWhenReferenceToBuiltinsMember.kt: (4, 8) Reflection types can't be loaded. Please ensure that you have Kotlin Runtime in your classpath
+WARNING: compiler/testData/cli/js/diagnosticWhenReferenceToBuiltinsMember.kt: (5, 5) The expression is unused
+ERROR: compiler/testData/cli/js/diagnosticWhenReferenceToBuiltinsMember.kt: (5, 11) Reflection types can't be loaded. Please ensure that you have Kotlin Runtime in your classpath
+COMPILATION_ERROR