[backend]将testdata/下的测例替换为了赛方测试用例，更新了测试脚本

testdata/functional/61_sort_test7.sy

@@ -0,0 +1,47 @@
+int buf[2][100];
+
+// sort [l, r)
+void merge_sort(int l, int r)
+{
+    if (l + 1 >= r)
+        return;
+
+    int mid = (l + r) / 2;
+    merge_sort(l, mid);
+    merge_sort(mid, r);
+
+    int i = l, j = mid, k = l;
+    while (i < mid && j < r) {
+        if (buf[0][i] < buf[0][j]) {
+            buf[1][k] = buf[0][i];
+            i = i + 1;
+        } else {
+            buf[1][k] = buf[0][j];
+            j = j + 1;
+        }
+        k = k + 1;
+    }
+    while (i < mid) {
+        buf[1][k] = buf[0][i];
+        i = i + 1;
+        k = k + 1;
+    }
+    while (j < r) {
+        buf[1][k] = buf[0][j];
+        j = j + 1;
+        k = k + 1;
+    }
+
+    while (l < r) {
+        buf[0][l] = buf[1][l];
+        l = l + 1;
+    }
+}
+
+int main()
+{
+    int n = getarray(buf[0]);
+    merge_sort(0, n);
+    putarray(n, buf[0]);
+    return 0;
+}