feat(deadcode): add caso de teste

Author: Sophiassilva

tests/pass/deadcode.c

@@ -0,0 +1,6 @@
+int main()
+{
+    int a = 10;
+    return a;
+    a = 20; 
+}

tests/pass/deadcode.lua

@@ -0,0 +1,4 @@
+os.exit((function(args)
+    local a = 10
+    return a
+end)(arg))