Makefile: make sure gdb is installed before sse4.2 check (#4832)
Makefile: make sure gdb is installed before sse4.2 check (#4832)

Signed-off-by: Kaige Ye <f94739373a5e2c903a507c075effad238d7b7494@kaige.org>
c4pt0r/tikv,BusyJay/tikv,pingcap/tikv,pingcap/tikv,BusyJay/tikv,BusyJay/tikv,BusyJay/tikv