Added test for KT-1735 Can't access "assert" function from stdlib

#KT-1735 fixed

compiler/testData/loadJava/compiledKotlin/fun/Assert.kt

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

compiler/testData/loadJava/compiledKotlin/fun/Assert.txt

@@ -0,0 +1,3 @@
+package test
+
+internal fun assert(): kotlin.Unit