devtools: catch symbol duplicates in version map
devtools: catch symbol duplicates in version map

Add a check on versioned symbol duplicates in map files.

Signed-off-by: David Marchand <f28529695cfa9e3e1eb84e7072aa626af4abb18e@redhat.com>

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