https://bugzilla.tianocore.org/show_bug.cgi?id=2080
This patch is to improve build -u option to re-use
GlobalVar_<platformguid>_<arch>.bin file which is
introduced by multiple-process-autogen feature.
Cc: Liming Gao <liming.gao@intel.com>
Cc: Steven Shi <steven.shi@intel.com>
Signed-off-by: Bob Feng <bob.c.feng@intel.com>
Acked-by: Liming Gao <liming.gao@intel.com>
373298ca0d