test/hash: add missing file in meson build
test/hash: add missing file in meson build

The test_hash_readwrite.c was not in the meson.build file. This
commit adds the missing test into the file.

Fixes: 0eb3726ebcf1 ("test/hash: add test for read/write concurrency")
Cc: stable@dpdk.org

Signed-off-by: Yipeng Wang <7cbe00ff6364999b5548d30abb0722f7c2a7092c@intel.com>
Acked-by: Bruce Richardson <66b9e8e8fbd5e9f41f91b0af050876182ce9d0e4@intel.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk