Add support for DPDK v16.04

The new release of DPDK, v16.04, in some build configuration will export the rte__alloc_ symbols in the librte_eal.so shared library. Added support in Valgrind for this new shared object.

DPDK support

Valgrind patched with support for DPDK (and rte_*alloc).

STATICALLY LINKED APPS: use --soname-synonyms=somalloc=NONE

DINAMICALLY LINKED APPS: SONAME must be either lib_dpdk.so_ librte_malloc.so*

NOTE: memory alignment is supported and implemented, but NUMA socket is ignored.