xpmem: Support large page attachment

Change-Id: I4d672eee1c905160ece204d278f0afd9b6d7dc01
Refs: #1259

test/issues/1259/mc_run.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+
+test -e /tmp/xpmem.share && rm -f /tmp/xpmem.share
+test -e /tmp/xpmem.lock && rm -f /tmp/xpmem.lock
+
+# create TMP_SHARE_SIZE bytes defined in xpmem_test.h
+for i in `seq 0 31` ; do
+	echo -n 0 >> /tmp/xpmem.share
+done
+echo 0 > /tmp/xpmem.lock
+
+# Run the main test app
+mcexec $PWD/xpmem_master
+exit 0
+