tests for NLB and STP instructions

tests/runtime/nlb/nlb_00.noja-test

@@ -0,0 +1,13 @@
+@type [runtime]
+
+@bytecode
+	
+	PUSHVAR "int";
+	NLB;
+
+	PUSHVAR "print";
+	CALL 1, 1;
+	POP 1;
+	EXIT;
+
+@output [?int]

tests/runtime/stp/stp_00.noja-test

@@ -0,0 +1,14 @@
+@type [runtime]
+
+@bytecode
+	
+	PUSHVAR "int";
+	PUSHVAR "float";
+	STP;
+
+	PUSHVAR "print";
+	CALL 1, 1;
+	POP 1;
+	EXIT;
+
+@output [int | float]