Ignore warnings about reduced hard ulimit.

scripts/xenofarm.sh

@@ -239,6 +239,7 @@ then
 |grep -v '/usr/include/sys/vnode.h:.*: warning: declaration of .free. shadows global declaration' \
 |grep -v 'aux-item-def-scan\.c:.*: warning: .* defined but not used' \
 |grep -v 'connections.c:.*: warning: duplicate .volatile.' \
+|grep -v 'cc: 1501-245 Warning: Hard ulimit has been reduced to less than RLIM_INFINITY.  There may not be enough space to complete the compilation.' \
 |grep -v '"format" is an unrecognized __declspec attribute' \
 |grep -v 'getopt.[hc]:.*: warning: function declaration isn.t a prototype' \
 |grep -v 'getopt.c:451: warning: .indfound. might be used uninitialized in this function' \