Add vgcore to gitignore

vgcore.NNN is core file generated by valgrind.

Signed-off-by: John Wang <wangzqbj@inspur.com>
Change-Id: I585017975f6a466e54b4a640033080d9511d8d1b
diff --git a/.gitignore b/.gitignore
index bb390fc..012f3f9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -70,6 +70,7 @@
 /test-suite.log
 /test/*.gcda
 /test/*.gcno
+/test/vgcore.*
 /test/libpldm_base_test
 /test/libpldmresponder_base_test
 /test/libpldm_bios_test