added test file wiki.c(liveness analysis)

benchmarks/wiki.c

+#include <stdio.h>
+
+int main(void)
+{
+    int a = 3, b = 5, d = 5, x = 100;
+    int c = 0;
+    if (a > b)
+    {
+        int c = a + b;
+        d = 2;
+    }
+    
+    c = 4;
+    
+    return b * d + c;
+}