app/test: disable variable tracking assignment for memcpy
app/test: disable variable tracking assignment for memcpy

VTA is for debugging only, it increases compile time and binary size,
especially when there're a lot of inlines.
So disable it since memcpy test contains a lot of inline calls.

Signed-off-by: Zhihong Wang <efad9c89b3a8db7900a2572fdee08ebbff3cfc6b@intel.com>
Acked-by: Cunming Liang <7edc6dd0948177c688da9b288939d80da3db4303@intel.com>
Acked-by: Pablo de Lara <28355d9cfe41bb8148aea0fb24f47aae8f4217a1@intel.com>

john-mcnamara-intel/dpdk,tsphillips/dpdk-fork,msune/dpdk,mixja/dpdk,tsphillips/dpdk-fork,tsphillips/dpdk-fork,venkynv/dpdk-mirror,msune/dpdk,john-mcnamara-intel/dpdk,venkynv/dpdk-mirror,john-mcnamara-intel/dpdk,venkynv/dpdk-mirror,mixja/dpdk,venkynv/dpdk-mirror,msune/dpdk,john-mcnamara-intel/dpdk,mixja/dpdk,mixja/dpdk,msune/dpdk,tsphillips/dpdk-fork