mem: fix resource leak on map failure

Coverity issue: 272601
Fixes: 66cc45e293ed ("mem: replace memseg with memseg lists")

Signed-off-by: Anatoly Burakov <anatoly.burakov@intel.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>

lib/librte_eal/linuxapp/eal/eal_memory.c

@@ -1750,6 +1750,7 @@ eal_legacy_hugepage_attach(void)
 		if (map_addr == MAP_FAILED) {
 			RTE_LOG(ERR, EAL, "Could not map %s: %s\n",
 				hf->filepath, strerror(errno));
+			close(fd);
 			goto error;
 		}