SimicsOpenBoardPkg: Fix gcc build failure

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2225



Currently, gcc 5 encounters an error "unused-but-set-variable" in
BdsPlatform.c  as a result of a Status variable not being used
after it's set.

This was fixed by printing the Status variable when
EfiBootManagerDeleteLoadOptionVariable function encounters
an error.

Cc: Ankit Sinha <ankit.sinha@intel.com>
Cc: Nate DeSimone <nathaniel.l.desimone@intel.com>
Cc: Kubacki Michael A <michael.a.kubacki@intel.com>
Signed-off-by: Prince Agyeman <prince.agyeman@intel.com>
Reviewed-by: Nate DeSimone <nathaniel.l.desimone@intel.com>
Reviewed-by: Michael Kubacki <michael.a.kubacki@intel.com>