Add vgcore to gitignore
Add vgcore to gitignore

vgcore.NNN is core file generated by valgrind.

Signed-off-by: John Wang <f94ba6c7f9f751e26d9bd16a9d1e9a602cdeac6b@inspur.com>
Change-Id: I585017975f6a466e54b4a640033080d9511d8d1b

openbmc/pldm,openbmc/pldm,openbmc/pldm