tests: added eqeq test

tests: sum-test: emproved test sum of int with various types of second argument (byte, short and etc)
tests: hello2 minor fix in test

backend.native/tests/codegen/function/eqeq.kt

@@ -0,0 +1,8 @@
+fun eqeqB(a:Byte,   b:Byte  ) = a == b
+fun eqeqS(a:Short,  b:Short ) = a == b
+fun eqeqI(a:Int,    b:Int   ) = a == b
+fun eqeqL(a:Long,   b:Long  ) = a == b
+fun eqeqF(a:Float,  b:Float ) = a == b
+fun eqeqD(a:Double, b:Double) = a == b
+
+//fun eqeqStr(a:String, b:String) = a == b