Fix RESOURCE_LEAK error in acl_profiler_test.cpp

Coverity picked up a `RESOURCE_LEAK` error that was not fixed in #267

Fixes:
```
test/acl_profiler_test.cpp:812:3:
  Type: Resource leak (RESOURCE_LEAK)

test/acl_profiler_test.cpp:756:3:
  1. path: Condition "MtUtest::threadNum() == 0", taking true branch.
test/acl_profiler_test.cpp:758:5:
  2. path: Condition "0 != status", taking true branch.
test/acl_profiler_test.cpp:758:5:
  3. path: Falling through to end of if statement.
test/acl_profiler_test.cpp:763:5:
  4. path: Condition "0 != status", taking true branch.
test/acl_profiler_test.cpp:763:5:
  5. path: Falling through to end of if statement.
test/acl_profiler_test.cpp:765:5:
  6. path: Condition "0 != clSetKernelArg(kernel, 0, 8UL /* sizeof (cl_mem) */, &src_mem)", taking true branch.
test/acl_profiler_test.cpp:765:5:
  7. path: Falling through to end of if statement.
test/acl_profiler_test.cpp:767:5:
  8. path: Condition "0 != clSetKernelArg(kernel, 1, 8UL /* sizeof (cl_mem) */, &src_mem)", taking true branch.
test/acl_profiler_test.cpp:767:5:
  9. path: Falling through to end of if statement.
test/acl_profiler_test.cpp:769:5:
  10. path: Condition "0 != clSetKernelArg(kernel, 2, 8UL /* sizeof (cl_mem) */, &src_mem)", taking true branch.
test/acl_profiler_test.cpp:769:5:
  11. path: Falling through to end of if statement.
test/acl_profiler_test.cpp:777:5:
  12. path: Condition "0 != status", taking true branch.
test/acl_profiler_test.cpp:777:5:
  13. path: Falling through to end of if statement.
test/acl_profiler_test.cpp:784:3:
  14. path: Condition "MtUtest::threadNum() == 0", taking true branch.
test/acl_profiler_test.cpp:786:5:
  15. path: Condition "active_op", taking true branch.
test/acl_profiler_test.cpp:786:5:
  16. path: Condition "!Utest::getCurrent()->assertTrue(active_op, "active_op", "/__w/fpga-runtime-for-opencl/fpga-runtime-for-opencl/test/acl_profiler_test.cpp", 786)", taking true branch.
test/acl_profiler_test.cpp:787:5:
  17. path: Condition "ACL_DEVICE_OP_KERNEL != active_op->info.type", taking true branch.
test/acl_profiler_test.cpp:787:5:
  18. path: Falling through to end of if statement.
test/acl_profiler_test.cpp:796:3:
  19. path: Condition "MtUtest::threadNum() == 0", taking true branch.
test/acl_profiler_test.cpp:797:5:
  20. alloc_fn: Storage is returned from allocation function "fopen".
test/acl_profiler_test.cpp:797:5:
  21. var_assign: Assigning: "fp" = storage returned from "fopen("profile.mon", "r")".
test/acl_profiler_test.cpp:798:5:
  22. path: Condition "fp == NULL", taking false branch.
test/acl_profiler_test.cpp:798:5:
  23. path: Condition "!Utest::getCurrent()->assertTrue(fp == NULL, "fp == NULL", "/__w/fpga-runtime-for-opencl/fpga-runtime-for-opencl/test/acl_profiler_test.cpp", 798)", taking true branch.
test/acl_profiler_test.cpp:805:5:
  24. path: Condition "acl_process_profiler_scan_chain(event->current_device_op)", taking true branch.
test/acl_profiler_test.cpp:805:5:
  25. path: Condition "!Utest::getCurrent()->assertTrue(acl_process_profiler_scan_chain(event->current_device_op), "acl_process_profiler_scan_chain(event->current_device_op)", "/__w/fpga-runtime-for-opencl/fpga-runtime-for-opencl/test/acl_profiler_test.cpp", 806)", taking true branch.
test/acl_profiler_test.cpp:807:5:
  26. path: Condition "acl_process_autorun_profiler_scan_chain(0, 0)", taking true branch.
test/acl_profiler_test.cpp:807:5:
  27. path: Condition "!Utest::getCurrent()->assertTrue(acl_process_autorun_profiler_scan_chain(0, 0), "acl_process_autorun_profiler_scan_chain(0, 0)", "/__w/fpga-runtime-for-opencl/fpga-runtime-for-opencl/test/acl_profiler_test.cpp", 807)", taking true branch.
test/acl_profiler_test.cpp:812:3:
  28. leaked_storage: Variable "fp" going out of scope leaks the storage it points to.
```

Author: IlanTruanovsky

test/acl_profiler_test.cpp

@@ -795,6 +795,9 @@ MT_TEST(acl_no_profile, no_profiler) {
 
   if (threadNum() == 0) {
     FILE *fp = fopen(PROFILE_MON, "r");
+    if (fp != NULL) {
+      fclose(fp);
+    }
     CHECK(fp == NULL);
 
     // Check that the low level call checks event completion status.