app/crypto-perf: fix AAD template copy overrun
app/crypto-perf: fix AAD template copy overrun

This patch fixes a possible buffer overrun problem in crypto perf test.
Previously when user configured AAD size is over 12 bytes the copy
of template AAD will cause a buffer overrun.
The problem is fixed by only copy up to 12 bytes of AAD template.

Fixes: 8a5b494a7f99 ("app/test-crypto-perf: add AEAD parameters")
Cc: stable@dpdk.org

Signed-off-by: Przemyslaw Zegan <64ddeb69482abbca6fe37d910a9367abae627199@intel.com>
Acked-by: Fan Zhang <b46d470dc79aa6fd718cd24d07380f6203b7fc3c@intel.com>

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