[PATCH v3] memblock test: Modify the obsolete description in README

[shaoqin . huang]

From: Shaoqin Huang <shaoqin.huang@xxxxxxxxx>

The VERBOSE option in Makefile has been moved, but there still have the
description left in README. For now, we use `-v` options when running
memblock test to print information, so using the new to replace the
obsolete items.

Signed-off-by: Shaoqin Huang <shaoqin.huang@xxxxxxxxx>
---
Changelog:
----------
v3:
  - Using `build options` replace `options` to make it more clear.
v2:
  - Tweak the sentence to make it more clear and continuesly.
  - Commit log changes.

 tools/testing/memblock/README | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/tools/testing/memblock/README b/tools/testing/memblock/README
index 058146b528a5..72162b5f4a76 100644
--- a/tools/testing/memblock/README
+++ b/tools/testing/memblock/README
@@ -33,20 +33,23 @@ To run the tests, build the main target and run it:
 
 $ make && ./main
 
-A successful run produces no output. It is also possible to override different
-configuration parameters. For example, to include verbose output, specify the
-VERBOSE flag when building the main target:
+A successful run produces no output. It is possible to control the behavior
+by passing options from command line. For example, to include verbose output,
+append the `-v` options when you run the tests:
 
-$ make VERBOSE=1
+$ ./main -v
 
 This will print information about which functions are being tested and the
 number of test cases that passed.
 
-To simulate enabled NUMA, use:
+For the full list of options from command line, see `./main --help`.
+
+It is also possible to override different configuration parameters to change it
+test functions. For example, To simulate enabled NUMA, use:
 
 $ make NUMA=1
 
-For the full list of options, see `make help`.
+For the full list of build options, see `make help`.
 
 Project structure
 =================
-- 
2.30.2