mempool: fix build with debug enabled and clang
mempool: fix build with debug enabled and clang

When enabling RTE_LIBRTE_MEMPOOL_DEBUG and compiling with clang
compiler an error occurs, because ifdefed code includes push/pop pragmas.

Signed-off-by: Keith Wiles <f97a07384723981b442bf4ce37d40edbfd008094@windriver.com>
Acked-by: Thomas Monjalon <ee2fa8b2681c737f775687e475dcbf2028a412f1@6wind.com>

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